Revert "Xcode backend refactor (#23387)" (#23528)

This reverts commit def1d80566024950f5e7aa748e5680e7f1480bcb.
diff --git a/packages/flutter_tools/bin/xcode_backend.sh b/packages/flutter_tools/bin/xcode_backend.sh
index 01e4a7a..7348c0e 100755
--- a/packages/flutter_tools/bin/xcode_backend.sh
+++ b/packages/flutter_tools/bin/xcode_backend.sh
@@ -46,35 +46,12 @@
     target_path="${FLUTTER_TARGET}"
   fi
 
-  # Use FLUTTER_BUILD_MODE if it's set, otherwise use the Xcode build configuration name
-  # This means that if someone wants to use an Xcode build config other than Debug/Profile/Release,
-  # they _must_ set FLUTTER_BUILD_MODE so we know what type of artifact to build.
-  local build_mode="$(echo "${FLUTTER_BUILD_MODE:-${CONFIGURATION}}" | tr "[:upper:]" "[:lower:]")"
-  local artifact_variant="unknown"
-  case "$build_mode" in
-    release) artifact_variant="ios-release";;
-    profile) artifact_variant="ios-profile";;
-    debug) artifact_variant="ios";;
-    *) 
-      EchoError "========================================================================"
-      EchoError "ERROR: Unknown FLUTTER_BUILD_MODE: ${build_mode}."
-      EchoError "Valid values are 'Debug', 'Profile', or 'Release' (case insensitive)."
-      EchoError "This is controlled by the FLUTTER_BUILD_MODE environment varaible."
-      EchoError "If that is not set, the CONFIGURATION environment variable is used."
-      EchoError ""
-      EchoError "You can fix this by either adding an appropriately named build"
-      EchoError "configuration, or adding an appriate value for FLUTTER_BUILD_MODE to the"
-      EchoError ".xcconfig file for the current build configuration (${CONFIGURATION})."
-      EchoError "========================================================================"
-      exit -1;;
-  esac
-
   # Archive builds (ACTION=install) should always run in release mode.
-  if [[ "$ACTION" == "install" && "$build_mode" != "release" ]]; then
+  if [[ "$ACTION" == "install" && "$FLUTTER_BUILD_MODE" != "release" ]]; then
     EchoError "========================================================================"
     EchoError "ERROR: Flutter archive builds must be run in Release mode."
     EchoError ""
-    EchoError "To correct, ensure FLUTTER_BUILD_MODE is set to release or run:"
+    EchoError "To correct, run:"
     EchoError "flutter build ios --release"
     EchoError ""
     EchoError "then re-run Archive from Xcode."
@@ -82,9 +59,24 @@
     exit -1
   fi
 
+  local build_mode="release"
+  if [[ -n "$FLUTTER_BUILD_MODE" ]]; then
+    build_mode="${FLUTTER_BUILD_MODE}"
+  fi
+
+  local artifact_variant="unknown"
+  case "$build_mode" in
+    release) artifact_variant="ios-release";;
+    profile) artifact_variant="ios-profile";;
+    debug) artifact_variant="ios";;
+    *) echo "Unknown FLUTTER_BUILD_MODE: $FLUTTER_BUILD_MODE";;
+  esac
+
   local framework_path="${FLUTTER_ROOT}/bin/cache/artifacts/engine/${artifact_variant}"
-  
-  AssertExists "${framework_path}"  
+  if [[ -n "$FLUTTER_FRAMEWORK_DIR" ]]; then
+    framework_path="${FLUTTER_FRAMEWORK_DIR}"
+  fi
+
   AssertExists "${project_path}"
 
   local derived_dir="${SOURCE_ROOT}/Flutter"
@@ -99,20 +91,7 @@
   local local_engine_flag=""
   local flutter_framework="${framework_path}/Flutter.framework"
   local flutter_podspec="${framework_path}/Flutter.podspec"
-
   if [[ -n "$LOCAL_ENGINE" ]]; then
-    if [[ $(echo "$LOCAL_ENGINE" | tr "[:upper:]" "[:lower:]") != *"$build_mode"* ]]; then
-      EchoError "========================================================================"
-      EchoError "ERROR: Requested build with Flutter local engine at '${LOCAL_ENGINE}'"
-      EchoError "This engine is not compatible with FLUTTER_BUILD_MODE: '${build_mode}'."
-      EchoError "You can fix this by updating the LOCAL_ENGINE environment variable, or"
-      EchoError "by running:"
-      EchoError "  flutter build ios --local-engine=ios_${build_mode}"
-      EchoError "or"
-      EchoError "  flutter build ios --local-engine=ios_${build_mode}_unopt"
-      EchoError "========================================================================"
-      exit -1
-    fi
     local_engine_flag="--local-engine=${LOCAL_ENGINE}"
     flutter_framework="${LOCAL_ENGINE}/Flutter.framework"
     flutter_podspec="${LOCAL_ENGINE}/Flutter.podspec"
@@ -150,16 +129,6 @@
     StreamOutput " ├─Building Dart code..."
     # Transform ARCHS to comma-separated list of target architectures.
     local archs="${ARCHS// /,}"
-    if [[ $archs =~ .*i386.* || $archs =~ .*x86_64.* ]]; then
-      EchoError "========================================================================"
-      EchoError "ERROR: Flutter does not support running in profile or release mode on"
-      EchoError "the Simulator (this build was: '$build_mode')."
-      EchoError "You can ensure Flutter runs in Debug mode with your host app in release"
-      EchoError "mode by setting FLUTTER_BUILD_MODE=debug in the .xcconfig associated"
-      EchoError "with the ${CONFIGURATION} build configuration."
-      EchoError "========================================================================"
-      exit -1
-    fi
     RunCommand "${FLUTTER_ROOT}/bin/flutter" --suppress-analytics           \
       ${verbose_flag}                                                       \
       build aot                                                             \
@@ -340,10 +309,8 @@
   # Prefer the hidden .ios folder, but fallback to a visible ios folder if .ios
   # doesn't exist.
   local flutter_ios_out_folder="${FLUTTER_APPLICATION_PATH}/.ios/Flutter"
-  local flutter_ios_engine_folder="${FLUTTER_APPLICATION_PATH}/.ios/Flutter/engine"
   if [[ ! -d ${flutter_ios_out_folder} ]]; then
     flutter_ios_out_folder="${FLUTTER_APPLICATION_PATH}/ios/Flutter"
-    flutter_ios_engine_folder="${FLUTTER_APPLICATION_PATH}/ios/Flutter"
   fi
 
   AssertExists "${flutter_ios_out_folder}"
@@ -363,7 +330,7 @@
   # Remove it first since Xcode might be trying to hold some of these files - this way we're 
   # sure to get a clean copy.
   RunCommand rm -rf -- "${xcode_frameworks_dir}/Flutter.framework"
-  RunCommand cp -Rv -- "${flutter_ios_engine_folder}/Flutter.framework" "${xcode_frameworks_dir}/"
+  RunCommand cp -Rv -- "${flutter_ios_out_folder}/engine/Flutter.framework" "${xcode_frameworks_dir}/"
   
   # Sign the binaries we moved.
   local identity="${EXPANDED_CODE_SIGN_IDENTITY_NAME:-$CODE_SIGN_IDENTITY}"
diff --git a/packages/flutter_tools/lib/src/ios/mac.dart b/packages/flutter_tools/lib/src/ios/mac.dart
index 25cc444..346392a 100644
--- a/packages/flutter_tools/lib/src/ios/mac.dart
+++ b/packages/flutter_tools/lib/src/ios/mac.dart
@@ -298,35 +298,6 @@
     printError('  open ios/Runner.xcworkspace');
     return XcodeBuildResult(success: false);
   }
-  if (!projectInfo.hasBuildConfiguratinForBuildMode(buildInfo.modeName)) {
-    // This error will occur with previous versions of the generated Xcode project, where a "Profile"
-    // build configuration did not exist.  It may also occur if a user manually removes or renames
-    // configurations from Runner.xcodeproj.
-    printError('The Xcode project does not define a build configuration "${buildInfo.modeName}",');
-    printError('which is needed by Flutter tooling to run "--${buildInfo.modeName}" from the command line.');
-    printError('');
-    printError('Open Xcode to fix the problem:');
-    printError('  open ios/Runner.xcodeproj');
-    printError('');
-    printError('1. Click on "Runner" in the project navigator.');
-    printError('2. Ensure the Runner PROJECT is selected, not the Runner TARGET.');
-    if (buildInfo.isDebug) {
-      printError('3. Click the Editor->Add Configuration->Duplicate "Debug" Configuration.');
-    } else {
-      printError('3. Click the Editor->Add Configuration->Duplicate "Release" Configuration.');
-    }
-    printError('');
-    printError('   If this option is disabled, it is likely you have the target selected instead');
-    printError('   of the project; see:');
-    printError('   https://stackoverflow.com/questions/19842746/adding-a-build-configuration-in-xcode');
-    printError('');
-    printError('   If you have created a completely custom set of build configurations,');
-    printError('   you can set the FLUTTER_BUILD_MODE=${buildInfo.modeName.toLowerCase()}');
-    printError('   in the .xcconfig file for that configuration and run from Xcode.');
-    printError('');
-    printError('4. If you are not using completely custom build configurations, name the newly created configuration ${buildInfo.modeName}.');
-    return XcodeBuildResult(success: false);
-  }
   final String scheme = projectInfo.schemeFor(buildInfo);
   if (scheme == null) {
     printError('');
diff --git a/packages/flutter_tools/lib/src/ios/xcodeproj.dart b/packages/flutter_tools/lib/src/ios/xcodeproj.dart
index a1990e8..2bb2a20 100644
--- a/packages/flutter_tools/lib/src/ios/xcodeproj.dart
+++ b/packages/flutter_tools/lib/src/ios/xcodeproj.dart
@@ -49,11 +49,21 @@
   if (targetOverride != null)
     localsBuffer.writeln('FLUTTER_TARGET=$targetOverride');
 
+  // The runtime mode for the current build.
+  localsBuffer.writeln('FLUTTER_BUILD_MODE=${buildInfo.modeName}');
+
   // The build outputs directory, relative to FLUTTER_APPLICATION_PATH.
   localsBuffer.writeln('FLUTTER_BUILD_DIR=${getBuildDirectory()}');
 
   localsBuffer.writeln('SYMROOT=\${SOURCE_ROOT}/../${getIosBuildDirectory()}');
 
+  if (!project.isModule) {
+    // For module projects we do not want to write the FLUTTER_FRAMEWORK_DIR
+    // explicitly. Rather we rely on the xcode backend script and the Podfile
+    // logic to derive it from FLUTTER_ROOT and FLUTTER_BUILD_MODE.
+    localsBuffer.writeln('FLUTTER_FRAMEWORK_DIR=${flutterFrameworkDir(buildInfo.mode)}');
+  }
+
   final String buildName = buildInfo?.buildName ?? project.manifest.buildName;
   if (buildName != null) {
     localsBuffer.writeln('FLUTTER_BUILD_NAME=$buildName');
@@ -237,17 +247,6 @@
       return baseConfiguration + '-$scheme';
   }
 
-  /// Checks whether the [buildConfigurations] contains the specified string, without
-  /// regard to case.
-  bool hasBuildConfiguratinForBuildMode(String buildMode) {
-    buildMode = buildMode.toLowerCase();
-    for (String name in buildConfigurations) {
-      if (name.toLowerCase() == buildMode) {
-        return true;
-      }
-    }
-    return false;
-  }
   /// Returns unique scheme matching [buildInfo], or null, if there is no unique
   /// best match.
   String schemeFor(BuildInfo buildInfo) {
@@ -275,13 +274,7 @@
     });
   }
 
-  static String _baseConfigurationFor(BuildInfo buildInfo) {
-    if (buildInfo.isDebug)
-      return 'Debug';
-    if (buildInfo.isProfile)
-      return 'Profile';
-    return 'Release';
-  }
+  static String _baseConfigurationFor(BuildInfo buildInfo) => buildInfo.isDebug ? 'Debug' : 'Release';
 
   static String _uniqueMatch(Iterable<String> strings, bool matches(String s)) {
     final List<String> options = strings.where(matches).toList();
diff --git a/packages/flutter_tools/templates/app/ios-objc.tmpl/Runner.xcodeproj/project.pbxproj.tmpl b/packages/flutter_tools/templates/app/ios-objc.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
index 92e02fc..dafa4ce 100644
--- a/packages/flutter_tools/templates/app/ios-objc.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
+++ b/packages/flutter_tools/templates/app/ios-objc.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
@@ -261,78 +261,6 @@
 /* End PBXVariantGroup section */
 
 /* Begin XCBuildConfiguration section */
-		249021D3217E4FDB00AE95B9 /* Profile */ = {
-			isa = XCBuildConfiguration;
-			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
-			buildSettings = {
-				ALWAYS_SEARCH_USER_PATHS = NO;
-				CLANG_ANALYZER_NONNULL = YES;
-				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
-				CLANG_CXX_LIBRARY = "libc++";
-				CLANG_ENABLE_MODULES = YES;
-				CLANG_ENABLE_OBJC_ARC = YES;
-				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
-				CLANG_WARN_BOOL_CONVERSION = YES;
-				CLANG_WARN_COMMA = YES;
-				CLANG_WARN_CONSTANT_CONVERSION = YES;
-				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
-				CLANG_WARN_EMPTY_BODY = YES;
-				CLANG_WARN_ENUM_CONVERSION = YES;
-				CLANG_WARN_INFINITE_RECURSION = YES;
-				CLANG_WARN_INT_CONVERSION = YES;
-				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
-				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
-				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
-				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
-				CLANG_WARN_STRICT_PROTOTYPES = YES;
-				CLANG_WARN_SUSPICIOUS_MOVE = YES;
-				CLANG_WARN_UNREACHABLE_CODE = YES;
-				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
-				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
-				COPY_PHASE_STRIP = NO;
-				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
-				ENABLE_NS_ASSERTIONS = NO;
-				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				GCC_C_LANGUAGE_STANDARD = gnu99;
-				GCC_NO_COMMON_BLOCKS = YES;
-				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
-				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
-				GCC_WARN_UNDECLARED_SELECTOR = YES;
-				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
-				GCC_WARN_UNUSED_FUNCTION = YES;
-				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
-				MTL_ENABLE_DEBUG_INFO = NO;
-				SDKROOT = iphoneos;
-				TARGETED_DEVICE_FAMILY = "1,2";
-				VALIDATE_PRODUCT = YES;
-			};
-			name = Profile;
-		};
-		249021D4217E4FDB00AE95B9 /* Profile */ = {
-			isa = XCBuildConfiguration;
-			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
-			buildSettings = {
-				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
-				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = S8QB4VV633;
-				ENABLE_BITCODE = NO;
-				FRAMEWORK_SEARCH_PATHS = (
-					"$(inherited)",
-					"$(PROJECT_DIR)/Flutter",
-				);
-				INFOPLIST_FILE = Runner/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				LIBRARY_SEARCH_PATHS = (
-					"$(inherited)",
-					"$(PROJECT_DIR)/Flutter",
-				);
-				PRODUCT_BUNDLE_IDENTIFIER = {{iosIdentifier}};
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				VERSIONING_SYSTEM = "apple-generic";
-			};
-			name = Profile;
-		};
 		97C147031CF9000F007C117D /* Debug */ = {
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
@@ -489,7 +417,6 @@
 			buildConfigurations = (
 				97C147031CF9000F007C117D /* Debug */,
 				97C147041CF9000F007C117D /* Release */,
-				249021D3217E4FDB00AE95B9 /* Profile */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
@@ -499,7 +426,6 @@
 			buildConfigurations = (
 				97C147061CF9000F007C117D /* Debug */,
 				97C147071CF9000F007C117D /* Release */,
-				249021D4217E4FDB00AE95B9 /* Profile */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
diff --git a/packages/flutter_tools/templates/app/ios-objc.tmpl/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme b/packages/flutter_tools/templates/app/ios-objc.tmpl/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
deleted file mode 100644
index 786d6aa..0000000
--- a/packages/flutter_tools/templates/app/ios-objc.tmpl/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
+++ /dev/null
@@ -1,93 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "0910"
-   version = "1.3">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
-               BuildableName = "Runner.app"
-               BlueprintName = "Runner"
-               ReferencedContainer = "container:Runner.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
-      shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
-            BuildableName = "Runner.app"
-            BlueprintName = "Runner"
-            ReferencedContainer = "container:Runner.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </TestAction>
-   <LaunchAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      debugServiceExtension = "internal"
-      allowLocationSimulation = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
-            BuildableName = "Runner.app"
-            BlueprintName = "Runner"
-            ReferencedContainer = "container:Runner.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </LaunchAction>
-   <ProfileAction
-      buildConfiguration = "Profile"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      debugDocumentVersioning = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
-            BuildableName = "Runner.app"
-            BlueprintName = "Runner"
-            ReferencedContainer = "container:Runner.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "Debug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>
diff --git a/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner.xcodeproj/project.pbxproj.tmpl b/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
index 40607cc..096fae6 100644
--- a/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
+++ b/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
@@ -257,78 +257,6 @@
 /* End PBXVariantGroup section */
 
 /* Begin XCBuildConfiguration section */
-		249021D3217E4FDB00AE95B9 /* Profile */ = {
-			isa = XCBuildConfiguration;
-			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
-			buildSettings = {
-				ALWAYS_SEARCH_USER_PATHS = NO;
-				CLANG_ANALYZER_NONNULL = YES;
-				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
-				CLANG_CXX_LIBRARY = "libc++";
-				CLANG_ENABLE_MODULES = YES;
-				CLANG_ENABLE_OBJC_ARC = YES;
-				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
-				CLANG_WARN_BOOL_CONVERSION = YES;
-				CLANG_WARN_COMMA = YES;
-				CLANG_WARN_CONSTANT_CONVERSION = YES;
-				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
-				CLANG_WARN_EMPTY_BODY = YES;
-				CLANG_WARN_ENUM_CONVERSION = YES;
-				CLANG_WARN_INFINITE_RECURSION = YES;
-				CLANG_WARN_INT_CONVERSION = YES;
-				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
-				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
-				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
-				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
-				CLANG_WARN_STRICT_PROTOTYPES = YES;
-				CLANG_WARN_SUSPICIOUS_MOVE = YES;
-				CLANG_WARN_UNREACHABLE_CODE = YES;
-				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
-				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
-				COPY_PHASE_STRIP = NO;
-				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
-				ENABLE_NS_ASSERTIONS = NO;
-				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				GCC_C_LANGUAGE_STANDARD = gnu99;
-				GCC_NO_COMMON_BLOCKS = YES;
-				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
-				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
-				GCC_WARN_UNDECLARED_SELECTOR = YES;
-				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
-				GCC_WARN_UNUSED_FUNCTION = YES;
-				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
-				MTL_ENABLE_DEBUG_INFO = NO;
-				SDKROOT = iphoneos;
-				TARGETED_DEVICE_FAMILY = "1,2";
-				VALIDATE_PRODUCT = YES;
-			};
-			name = Profile;
-		};
-		249021D4217E4FDB00AE95B9 /* Profile */ = {
-			isa = XCBuildConfiguration;
-			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
-			buildSettings = {
-				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
-				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = S8QB4VV633;
-				ENABLE_BITCODE = NO;
-				FRAMEWORK_SEARCH_PATHS = (
-					"$(inherited)",
-					"$(PROJECT_DIR)/Flutter",
-				);
-				INFOPLIST_FILE = Runner/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				LIBRARY_SEARCH_PATHS = (
-					"$(inherited)",
-					"$(PROJECT_DIR)/Flutter",
-				);
-				PRODUCT_BUNDLE_IDENTIFIER = {{iosIdentifier}};
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				VERSIONING_SYSTEM = "apple-generic";
-			};
-			name = Profile;
-		};
 		97C147031CF9000F007C117D /* Debug */ = {
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
@@ -495,7 +423,6 @@
 			buildConfigurations = (
 				97C147031CF9000F007C117D /* Debug */,
 				97C147041CF9000F007C117D /* Release */,
-				249021D3217E4FDB00AE95B9 /* Profile */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
@@ -505,13 +432,11 @@
 			buildConfigurations = (
 				97C147061CF9000F007C117D /* Debug */,
 				97C147071CF9000F007C117D /* Release */,
-				249021D4217E4FDB00AE95B9 /* Profile */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
-
 	};
 	rootObject = 97C146E61CF9000F007C117D /* Project object */;
 }
diff --git a/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme b/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
deleted file mode 100644
index 786d6aa..0000000
--- a/packages/flutter_tools/templates/app/ios-swift.tmpl/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
+++ /dev/null
@@ -1,93 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "0910"
-   version = "1.3">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
-               BuildableName = "Runner.app"
-               BlueprintName = "Runner"
-               ReferencedContainer = "container:Runner.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
-      shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
-            BuildableName = "Runner.app"
-            BlueprintName = "Runner"
-            ReferencedContainer = "container:Runner.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </TestAction>
-   <LaunchAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      debugServiceExtension = "internal"
-      allowLocationSimulation = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
-            BuildableName = "Runner.app"
-            BlueprintName = "Runner"
-            ReferencedContainer = "container:Runner.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </LaunchAction>
-   <ProfileAction
-      buildConfiguration = "Profile"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      debugDocumentVersioning = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
-            BuildableName = "Runner.app"
-            BlueprintName = "Runner"
-            ReferencedContainer = "container:Runner.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "Debug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>
diff --git a/packages/flutter_tools/templates/app/ios.tmpl/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme b/packages/flutter_tools/templates/app/ios.tmpl/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
index 786d6aa..1263ac8 100644
--- a/packages/flutter_tools/templates/app/ios.tmpl/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
+++ b/packages/flutter_tools/templates/app/ios.tmpl/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
@@ -67,7 +67,7 @@
       </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
-      buildConfiguration = "Profile"
+      buildConfiguration = "Release"
       shouldUseLaunchSchemeArgsEnv = "YES"
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
diff --git a/packages/flutter_tools/templates/module/ios/host_app_ephemeral/Runner.xcodeproj.tmpl/project.pbxproj.tmpl b/packages/flutter_tools/templates/module/ios/host_app_ephemeral/Runner.xcodeproj.tmpl/project.pbxproj.tmpl
index c8ea567..8d4b827 100644
--- a/packages/flutter_tools/templates/module/ios/host_app_ephemeral/Runner.xcodeproj.tmpl/project.pbxproj.tmpl
+++ b/packages/flutter_tools/templates/module/ios/host_app_ephemeral/Runner.xcodeproj.tmpl/project.pbxproj.tmpl
@@ -260,78 +260,6 @@
 /* End PBXVariantGroup section */
 
 /* Begin XCBuildConfiguration section */
-		249021D3217E4FDB00AE95B9 /* Profile */ = {
-			isa = XCBuildConfiguration;
-			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
-			buildSettings = {
-				ALWAYS_SEARCH_USER_PATHS = NO;
-				CLANG_ANALYZER_NONNULL = YES;
-				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
-				CLANG_CXX_LIBRARY = "libc++";
-				CLANG_ENABLE_MODULES = YES;
-				CLANG_ENABLE_OBJC_ARC = YES;
-				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
-				CLANG_WARN_BOOL_CONVERSION = YES;
-				CLANG_WARN_COMMA = YES;
-				CLANG_WARN_CONSTANT_CONVERSION = YES;
-				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
-				CLANG_WARN_EMPTY_BODY = YES;
-				CLANG_WARN_ENUM_CONVERSION = YES;
-				CLANG_WARN_INFINITE_RECURSION = YES;
-				CLANG_WARN_INT_CONVERSION = YES;
-				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
-				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
-				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
-				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
-				CLANG_WARN_STRICT_PROTOTYPES = YES;
-				CLANG_WARN_SUSPICIOUS_MOVE = YES;
-				CLANG_WARN_UNREACHABLE_CODE = YES;
-				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
-				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
-				COPY_PHASE_STRIP = NO;
-				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
-				ENABLE_NS_ASSERTIONS = NO;
-				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				GCC_C_LANGUAGE_STANDARD = gnu99;
-				GCC_NO_COMMON_BLOCKS = YES;
-				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
-				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
-				GCC_WARN_UNDECLARED_SELECTOR = YES;
-				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
-				GCC_WARN_UNUSED_FUNCTION = YES;
-				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
-				MTL_ENABLE_DEBUG_INFO = NO;
-				SDKROOT = iphoneos;
-				TARGETED_DEVICE_FAMILY = "1,2";
-				VALIDATE_PRODUCT = YES;
-			};
-			name = Profile;
-		};
-		249021D4217E4FDB00AE95B9 /* Profile */ = {
-			isa = XCBuildConfiguration;
-			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
-			buildSettings = {
-				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
-				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = S8QB4VV633;
-				ENABLE_BITCODE = NO;
-				FRAMEWORK_SEARCH_PATHS = (
-					"$(inherited)",
-					"$(PROJECT_DIR)/Flutter",
-				);
-				INFOPLIST_FILE = Runner/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				LIBRARY_SEARCH_PATHS = (
-					"$(inherited)",
-					"$(PROJECT_DIR)/Flutter",
-				);
-				PRODUCT_BUNDLE_IDENTIFIER = {{iosIdentifier}};
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				VERSIONING_SYSTEM = "apple-generic";
-			};
-			name = Profile;
-		};
 		97C147031CF9000F007C117D /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
@@ -488,7 +416,6 @@
 			buildConfigurations = (
 				97C147031CF9000F007C117D /* Debug */,
 				97C147041CF9000F007C117D /* Release */,
-				249021D3217E4FDB00AE95B9 /* Profile */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
@@ -498,13 +425,11 @@
 			buildConfigurations = (
 				97C147061CF9000F007C117D /* Debug */,
 				97C147071CF9000F007C117D /* Release */,
-				249021D4217E4FDB00AE95B9 /* Profile */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
-
 	};
 	rootObject = 97C146E61CF9000F007C117D /* Project object */;
 }
diff --git a/packages/flutter_tools/test/commands/create_test.dart b/packages/flutter_tools/test/commands/create_test.dart
index 19359a4..e72171d 100644
--- a/packages/flutter_tools/test/commands/create_test.dart
+++ b/packages/flutter_tools/test/commands/create_test.dart
@@ -479,6 +479,7 @@
     final String xcodeConfig = xcodeConfigFile.readAsStringSync();
     expect(xcodeConfig, contains('FLUTTER_ROOT='));
     expect(xcodeConfig, contains('FLUTTER_APPLICATION_PATH='));
+    expect(xcodeConfig, contains('FLUTTER_FRAMEWORK_DIR='));
     // App identification
     final String xcodeProjectPath = fs.path.join('ios', 'Runner.xcodeproj', 'project.pbxproj');
     expectExists(xcodeProjectPath);
diff --git a/packages/flutter_tools/test/ios/xcode_backend_test.dart b/packages/flutter_tools/test/ios/xcode_backend_test.dart
deleted file mode 100644
index 26d0c63..0000000
--- a/packages/flutter_tools/test/ios/xcode_backend_test.dart
+++ /dev/null
@@ -1,68 +0,0 @@
-// Copyright 2018 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'package:flutter_tools/src/base/io.dart';
-import 'package:flutter_tools/src/base/platform.dart';
-
-import '../src/common.dart';
-
-const String xcodeBackendPath = 'bin/xcode_backend.sh';
-const String xcodeBackendErrorHeader = '========================================================================';
-
-// Acceptable $CONFIGURATION/$FLUTTER_BUILD_MODE values should be debug, profile, or release
-const Map<String, String> unknownConfiguration = <String, String>{
-  'CONFIGURATION': 'Custom',
-};
-
-// $FLUTTER_BUILD_MODE will override $CONFIGURATION
-const Map<String, String> unknownFlutterBuildMode = <String, String>{
-  'FLUTTER_BUILD_MODE': 'Custom',
-  'CONFIGURATION': 'Debug',
-};
-
-// Can't archive a non-release build.
-const Map<String, String> installWithoutRelease = <String, String>{
-  'CONFIGURATION': 'Debug',
-  'ACTION': 'install',
-};
-
-// Can't use a debug engine build with a release build.
-const Map<String, String> localEngineDebugBuildModeRelease = <String, String>{
-  'SOURCE_ROOT': '../../examples/hello_world',
-  'FLUTTER_ROOT': '../..',
-  'LOCAL_ENGINE': '/engine/src/out/ios_debug_unopt',
-  'CONFIGURATION': 'Release'
-};
-
-// Can't use a debug build with a profile engine.
-const Map<String, String> localEngineProfileBuildeModeRelease =
-    <String, String>{
-  'SOURCE_ROOT': '../../examples/hello_world',
-  'FLUTTER_ROOT': '../..',
-  'LOCAL_ENGINE': '/engine/src/out/ios_profile',
-  'CONFIGURATION': 'Debug',
-  'FLUTTER_BUILD_MODE': 'Debug',
-};
-
-void main() {
-  Future<void> expectXcodeBackendFails(Map<String, String> environment) async {
-    final ProcessResult result = await Process.run(
-      xcodeBackendPath,
-      <String>['build'],
-      environment: environment,
-    );
-    expect(result.stderr, startsWith(xcodeBackendErrorHeader));
-    expect(result.exitCode, isNot(0));
-  }
-
-  test('Xcode backend fails for on unsupported configuration combinations', () async {
-    await expectXcodeBackendFails(unknownConfiguration);
-    await expectXcodeBackendFails(unknownFlutterBuildMode);
-
-    await expectXcodeBackendFails(installWithoutRelease);
-
-    await expectXcodeBackendFails(localEngineDebugBuildModeRelease);
-    await expectXcodeBackendFails(localEngineProfileBuildeModeRelease);
-  }, skip: !platform.isMacOS);
-}
diff --git a/packages/flutter_tools/test/ios/xcodeproj_test.dart b/packages/flutter_tools/test/ios/xcodeproj_test.dart
index 874f897..d80fbc1 100644
--- a/packages/flutter_tools/test/ios/xcodeproj_test.dart
+++ b/packages/flutter_tools/test/ios/xcodeproj_test.dart
@@ -197,7 +197,7 @@
     });
     test('expected build configuration for non-flavored build is derived from BuildMode', () {
       expect(XcodeProjectInfo.expectedBuildConfigurationFor(BuildInfo.debug, 'Runner'), 'Debug');
-      expect(XcodeProjectInfo.expectedBuildConfigurationFor(BuildInfo.profile, 'Runner'), 'Profile');
+      expect(XcodeProjectInfo.expectedBuildConfigurationFor(BuildInfo.profile, 'Runner'), 'Release');
       expect(XcodeProjectInfo.expectedBuildConfigurationFor(BuildInfo.release, 'Runner'), 'Release');
     });
     test('expected scheme for flavored build is the title-cased flavor', () {
@@ -207,7 +207,7 @@
     });
     test('expected build configuration for flavored build is Mode-Flavor', () {
       expect(XcodeProjectInfo.expectedBuildConfigurationFor(const BuildInfo(BuildMode.debug, 'hello'), 'Hello'), 'Debug-Hello');
-      expect(XcodeProjectInfo.expectedBuildConfigurationFor(const BuildInfo(BuildMode.profile, 'HELLO'), 'Hello'), 'Profile-Hello');
+      expect(XcodeProjectInfo.expectedBuildConfigurationFor(const BuildInfo(BuildMode.profile, 'HELLO'), 'Hello'), 'Release-Hello');
       expect(XcodeProjectInfo.expectedBuildConfigurationFor(const BuildInfo(BuildMode.release, 'Hello'), 'Hello'), 'Release-Hello');
     });
     test('scheme for default project is Runner', () {
@@ -218,9 +218,9 @@
       expect(info.schemeFor(const BuildInfo(BuildMode.debug, 'unknown')), isNull);
     });
     test('build configuration for default project is matched against BuildMode', () {
-      final XcodeProjectInfo info = XcodeProjectInfo(<String>['Runner'], <String>['Debug', 'Profile', 'Release'], <String>['Runner']);
+      final XcodeProjectInfo info = XcodeProjectInfo(<String>['Runner'], <String>['Debug', 'Release'], <String>['Runner']);
       expect(info.buildConfigurationFor(BuildInfo.debug, 'Runner'), 'Debug');
-      expect(info.buildConfigurationFor(BuildInfo.profile, 'Runner'), 'Profile');
+      expect(info.buildConfigurationFor(BuildInfo.profile, 'Runner'), 'Release');
       expect(info.buildConfigurationFor(BuildInfo.release, 'Runner'), 'Release');
     });
     test('scheme for project with custom schemes is matched against flavor', () {
@@ -238,12 +238,12 @@
     test('build configuration for project with custom schemes is matched against BuildMode and flavor', () {
       final XcodeProjectInfo info = XcodeProjectInfo(
         <String>['Runner'],
-        <String>['debug (free)', 'Debug paid', 'profile - Free', 'Profile-Paid', 'release - Free', 'Release-Paid'],
+        <String>['debug (free)', 'Debug paid', 'release - Free', 'Release-Paid'],
         <String>['Free', 'Paid'],
       );
       expect(info.buildConfigurationFor(const BuildInfo(BuildMode.debug, 'free'), 'Free'), 'debug (free)');
       expect(info.buildConfigurationFor(const BuildInfo(BuildMode.debug, 'Paid'), 'Paid'), 'Debug paid');
-      expect(info.buildConfigurationFor(const BuildInfo(BuildMode.profile, 'FREE'), 'Free'), 'profile - Free');
+      expect(info.buildConfigurationFor(const BuildInfo(BuildMode.profile, 'FREE'), 'Free'), 'release - Free');
       expect(info.buildConfigurationFor(const BuildInfo(BuildMode.release, 'paid'), 'Paid'), 'Release-Paid');
     });
     test('build configuration for project with inconsistent naming is null', () {