Let iOS auto-signing tool handle Googler scenario (#16010)

* Let iOS auto-signing tool handle Googler scenario

* Forgot to update tests

packages/flutter_tools/lib/src/ios/code_signing.dart

diff --git a/packages/flutter_tools/lib/src/ios/code_signing.dart b/packages/flutter_tools/lib/src/ios/code_signing.dart
index 54f2289..2e1d5c2 100644
--- a/packages/flutter_tools/lib/src/ios/code_signing.dart
+++ b/packages/flutter_tools/lib/src/ios/code_signing.dart
@@ -83,9 +83,15 @@
 /// signing identities in the user's keychain prompting a choice if multiple
 /// are found.
 ///
+/// Returns a set of build configuration settings that uses the selected
+/// signing identities.
+///
 /// Will return null if none are found, if the user cancels or if the Xcode
 /// project has a development team set in the project's build settings.
-Future<String> getCodeSigningIdentityDevelopmentTeam({BuildableIOSApp iosApp, bool usesTerminalUi: true}) async{
+Future<Map<String, String>> getCodeSigningIdentityDevelopmentTeam({
+  BuildableIOSApp iosApp,
+  bool usesTerminalUi: true
+}) async{
   if (iosApp.buildSettings == null)
     return null;
 
@@ -154,9 +160,19 @@
   if (await opensslProcess.exitCode != 0)
     return null;
 
-  return _certificateOrganizationalUnitExtractionPattern
+  final Map<String, String> signingConfigs = <String, String> {
+    'DEVELOPMENT_TEAM': _certificateOrganizationalUnitExtractionPattern
       .firstMatch(opensslOutput)
-      ?.group(1);
+      ?.group(1),
+  };
+
+  if (opensslOutput.contains('iPhone Developer: Google Development')) {
+    signingConfigs['PROVISIONING_PROFILE_SPECIFIER'] = 'Google Development';
+    signingConfigs['CODE_SIGN_STYLE'] = 'Manual';
+    printStatus("Manually selecting Google's mobile provisioning profile (see go/google-flutter-signing).");
+  }
+
+  return signingConfigs;
 }
 
 Future<String> _chooseSigningIdentity(List<String> validCodeSigningIdentities, bool usesTerminalUi) async {

packages/flutter_tools/lib/src/ios/mac.dart

diff --git a/packages/flutter_tools/lib/src/ios/mac.dart b/packages/flutter_tools/lib/src/ios/mac.dart
index 7356716..ff3d9d1 100644
--- a/packages/flutter_tools/lib/src/ios/mac.dart
+++ b/packages/flutter_tools/lib/src/ios/mac.dart
@@ -225,9 +225,9 @@
     return new XcodeBuildResult(success: false);
   }
 
-  String developmentTeam;
+  Map<String, String> autoSigningConfigs;
   if (codesign && buildForDevice)
-    developmentTeam = await getCodeSigningIdentityDevelopmentTeam(iosApp: app, usesTerminalUi: usesTerminalUi);
+    autoSigningConfigs = await getCodeSigningIdentityDevelopmentTeam(iosApp: app, usesTerminalUi: usesTerminalUi);
 
   // Before the build, all service definitions must be updated and the dylibs
   // copied over to a location that is suitable for Xcodebuild to find them.
@@ -287,8 +287,10 @@
     buildCommands.add('-quiet');
   }
 
-  if (developmentTeam != null) {
-    buildCommands.add('DEVELOPMENT_TEAM=$developmentTeam');
+  if (autoSigningConfigs != null) {
+    for (MapEntry<String, String> signingConfig in autoSigningConfigs.entries) {
+      buildCommands.add('${signingConfig.key}=${signingConfig.value}');
+    }
     buildCommands.add('-allowProvisioningUpdates');
     buildCommands.add('-allowProvisioningDeviceRegistration');
   }