Allow bundle identifier to be surrounded with quotes. (#26300)

Picked up from #22498, originally by @jugyo

packages/flutter_tools/lib/src/project.dart

diff --git a/packages/flutter_tools/lib/src/project.dart b/packages/flutter_tools/lib/src/project.dart
index 9e4bdac..bfbe689 100644
--- a/packages/flutter_tools/lib/src/project.dart
+++ b/packages/flutter_tools/lib/src/project.dart
@@ -156,7 +156,7 @@
   /// The parent of this project.
   final FlutterProject parent;
 
-  static final RegExp _productBundleIdPattern = RegExp(r'^\s*PRODUCT_BUNDLE_IDENTIFIER\s*=\s*(.*);\s*$');
+  static final RegExp _productBundleIdPattern = RegExp(r'''^\s*PRODUCT_BUNDLE_IDENTIFIER\s*=\s*(["']?)(.*?)\1;\s*$''');
   static const String _productBundleIdVariable = r'$(PRODUCT_BUNDLE_IDENTIFIER)';
   static const String _hostAppBundleName = 'Runner';
 
@@ -225,7 +225,7 @@
       // Info.plist has no build variables in product bundle ID.
       return fromPlist;
     }
-    final String fromPbxproj = _firstMatchInFile(xcodeProjectInfoFile, _productBundleIdPattern)?.group(1);
+    final String fromPbxproj = _firstMatchInFile(xcodeProjectInfoFile, _productBundleIdPattern)?.group(2);
     if (fromPbxproj != null && (fromPlist == null || fromPlist == _productBundleIdVariable)) {
       // Common case. Avoids parsing build settings.
       return fromPbxproj;

packages/flutter_tools/test/project_test.dart

diff --git a/packages/flutter_tools/test/project_test.dart b/packages/flutter_tools/test/project_test.dart
index b36ba16..82bbf89 100644
--- a/packages/flutter_tools/test/project_test.dart
+++ b/packages/flutter_tools/test/project_test.dart
@@ -271,6 +271,21 @@
         when(mockIOSWorkflow.getPlistValueFromFile(any, any)).thenReturn('\$(PRODUCT_BUNDLE_IDENTIFIER).\$(SUFFIX)');
         expect(project.ios.productBundleIdentifier, 'io.flutter.someProject.suffix');
       });
+      testWithMocks('empty surrounded by quotes', () async {
+        final FlutterProject project = await someProject();
+        addIosWithBundleId(project.directory, '', qualifier: '"');
+        expect(project.ios.productBundleIdentifier, '');
+      });
+      testWithMocks('surrounded by double quotes', () async {
+        final FlutterProject project = await someProject();
+        addIosWithBundleId(project.directory, 'io.flutter.someProject', qualifier: '"');
+        expect(project.ios.productBundleIdentifier, 'io.flutter.someProject');
+      });
+      testWithMocks('surrounded by single quotes', () async {
+        final FlutterProject project = await someProject();
+        addIosWithBundleId(project.directory, 'io.flutter.someProject', qualifier: '\'');
+        expect(project.ios.productBundleIdentifier, 'io.flutter.someProject');
+      });
     });
 
     group('organization names set', () {
@@ -425,13 +440,13 @@
   expect(entity.existsSync(), isFalse);
 }
 
-void addIosWithBundleId(Directory directory, String id) {
+void addIosWithBundleId(Directory directory, String id, {String qualifier}) {
   directory
       .childDirectory('ios')
       .childDirectory('Runner.xcodeproj')
       .childFile('project.pbxproj')
         ..createSync(recursive: true)
-        ..writeAsStringSync(projectFileWithBundleId(id));
+    ..writeAsStringSync(projectFileWithBundleId(id, qualifier: qualifier));
 }
 
 void addAndroidWithApplicationId(Directory directory, String id) {
@@ -460,13 +475,13 @@
   invalid:
 ''';
 
-String projectFileWithBundleId(String id) {
+String projectFileWithBundleId(String id, {String qualifier}) {
   return '''
 97C147061CF9000F007C117D /* Debug */ = {
   isa = XCBuildConfiguration;
   baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
   buildSettings = {
-    PRODUCT_BUNDLE_IDENTIFIER = $id;
+    PRODUCT_BUNDLE_IDENTIFIER = ${qualifier ?? ''}$id${qualifier ?? ''};
     PRODUCT_NAME = "\$(TARGET_NAME)";
   };
   name = Debug;