allow ignoring toString, hashCode, and == in api_conform_test (#13907)

lib/web_ui/lib/src/ui/painting.dart

@@ -1480,15 +1480,6 @@ abstract class ColorFilter {
   List<dynamic> webOnlySerializeToCssPaint() {
     throw UnsupportedError('ColorFilter for CSS paint not yet supported');
   }
-
-  @override
-  bool operator ==(dynamic other);
-
-  @override
-  int get hashCode;
-
-  @override
-  String toString();
 }
 
 /// Styles to use for blurs in [MaskFilter] objects.

lib/web_ui/lib/src/ui/text.dart

@@ -472,15 +472,6 @@ abstract class TextStyle {
     List<Shadow> shadows,
     List<FontFeature> fontFeatures,
   }) = engine.EngineTextStyle;
-
-  @override
-  int get hashCode;
-
-  @override
-  bool operator ==(dynamic other);
-
-  @override
-  String toString();
 }
 
 /// An opaque object that determines the configuration used by
@@ -553,15 +544,6 @@ abstract class ParagraphStyle {
     String ellipsis,
     Locale locale,
   }) = engine.EngineParagraphStyle;
-
-  @override
-  bool operator ==(dynamic other);
-
-  @override
-  int get hashCode;
-
-  @override
-  String toString();
 }
 
 abstract class StrutStyle {
@@ -610,12 +592,6 @@ abstract class StrutStyle {
     FontStyle fontStyle,
     bool forceStrutHeight,
   }) = engine.EngineStrutStyle;
-
-  @override
-  int get hashCode;
-
-  @override
-  bool operator ==(dynamic other);
 }
 
 /// A direction in which text flows.

web_sdk/test/api_conform_test.dart

@@ -6,6 +6,13 @@ import 'dart:io';
 
 import 'package:analyzer/analyzer.dart';
 
+// Ignore members defined on Object.
+const Set<String> _kObjectMembers = <String>{
+  '==',
+  'toString',
+  'hashCode',
+};
+
 void main() {
   // These files just contain imports to the part files;
   final CompilationUnit uiUnit = parseDartFile('lib/ui/ui.dart',
@@ -105,6 +112,9 @@ void main() {
     }
 
     for (String methodName in uiMethods.keys) {
+      if (_kObjectMembers.contains(methodName)) {
+        continue;
+      }
       final MethodDeclaration uiMethod = uiMethods[methodName];
       final MethodDeclaration webMethod = webMethods[methodName];
       if (webMethod == null) {