Additional fixes for invalid overrides in dart2js

pkg/compiler/lib/src/js_backend/namer_names.dart

Index: pkg/compiler/lib/src/js_backend/namer_names.dart
diff --git a/pkg/compiler/lib/src/js_backend/namer_names.dart b/pkg/compiler/lib/src/js_backend/namer_names.dart
index 981e3a87e35c82a00a793dd8d684ba691e34d1e3..9f351e395367a98719cfc66b3823435d431a34b2 100644
--- a/pkg/compiler/lib/src/js_backend/namer_names.dart
+++ b/pkg/compiler/lib/src/js_backend/namer_names.dart
@@ -4,6 +4,7 @@
 
 part of js_backend.namer;
 
+// ignore: STRONG_MODE_INVALID_METHOD_OVERRIDE_FROM_BASE
 abstract class _NamerName extends jsAst.Name {
   int get _kind;
   _NamerName get _target => this;
@@ -18,6 +19,7 @@ abstract class _NamerName extends jsAst.Name {
 
 enum _NamerNameKinds { StringBacked, Getter, Setter, Async, Compound, Token }
 
+// ignore: STRONG_MODE_INVALID_METHOD_OVERRIDE_FROM_BASE
 class StringBackedName extends _NamerName {
   final String name;
   int get _kind => _NamerNameKinds.StringBacked.index;
@@ -41,6 +43,7 @@ class StringBackedName extends _NamerName {
   }
 }
 
+// ignore: STRONG_MODE_INVALID_METHOD_OVERRIDE_FROM_BASE
 abstract class _PrefixedName extends _NamerName implements jsAst.AstContainer {
   final jsAst.Name prefix;
   final jsAst.Name base;
@@ -78,18 +81,21 @@ abstract class _PrefixedName extends _NamerName implements jsAst.AstContainer {
   }
 }
 
+// ignore: STRONG_MODE_INVALID_METHOD_OVERRIDE_FROM_BASE
 class GetterName extends _PrefixedName {
   int get _kind => _NamerNameKinds.Getter.index;
 
   GetterName(jsAst.Name prefix, jsAst.Name base) : super(prefix, base);
 }
 
+// ignore: STRONG_MODE_INVALID_METHOD_OVERRIDE_FROM_BASE
 class SetterName extends _PrefixedName {
   int get _kind => _NamerNameKinds.Setter.index;
 
   SetterName(jsAst.Name prefix, jsAst.Name base) : super(prefix, base);
 }
 
+// ignore: STRONG_MODE_INVALID_METHOD_OVERRIDE_FROM_BASE
 class _AsyncName extends _PrefixedName {
   int get _kind => _NamerNameKinds.Async.index;
 
@@ -99,6 +105,7 @@ class _AsyncName extends _PrefixedName {
   bool get allowRename => true;
 }
 
+// ignore: STRONG_MODE_INVALID_METHOD_OVERRIDE_FROM_BASE
 class CompoundName extends _NamerName implements jsAst.AstContainer {
   final List<_NamerName> _parts;
   int get _kind => _NamerNameKinds.Compound.index;
@@ -154,6 +161,7 @@ class CompoundName extends _NamerName implements jsAst.AstContainer {
   }
 }
 
+// ignore: STRONG_MODE_INVALID_METHOD_OVERRIDE_FROM_BASE
 class TokenName extends _NamerName implements jsAst.ReferenceCountedAstNode {
   int get _kind => _NamerNameKinds.Token.index;
   String _name;
@@ -199,6 +207,7 @@ class TokenName extends _NamerName implements jsAst.ReferenceCountedAstNode {
   }
 }
 
+// ignore: STRONG_MODE_INVALID_METHOD_OVERRIDE_FROM_BASE
 class _NameReference extends _NamerName implements jsAst.AstContainer {
   _NamerName _target;