Don't hide interceptors in mirrors.

sdk/lib/_internal/compiler/implementation/js_emitter/type_test_emitter.dart

Index: sdk/lib/_internal/compiler/implementation/js_emitter/type_test_emitter.dart
diff --git a/sdk/lib/_internal/compiler/implementation/js_emitter/type_test_emitter.dart b/sdk/lib/_internal/compiler/implementation/js_emitter/type_test_emitter.dart
index c2cb16be184f734ce89383a9af869eff74fd08e8..6a447fb32304595fc21f327b1d905de8b38fa531 100644
--- a/sdk/lib/_internal/compiler/implementation/js_emitter/type_test_emitter.dart
+++ b/sdk/lib/_internal/compiler/implementation/js_emitter/type_test_emitter.dart
@@ -49,7 +49,6 @@ class TypeTestEmitter extends CodeEmitterHelper {
         // Avoid emitting [:$isObject:] on all classes but [Object].
         return;
       }
-      other = backend.getImplementationClass(other);
       builder.addProperty(namer.operatorIs(other), js('true'));
     }
 
@@ -232,7 +231,8 @@ class TypeTestEmitter extends CodeEmitterHelper {
   Map<FunctionType, bool> getFunctionTypeChecksOn(DartType type) {
     Map<FunctionType, bool> functionTypeMap = new Map<FunctionType, bool>();
     for (FunctionType functionType in checkedFunctionTypes) {
-      int maybeSubtype = compiler.types.computeSubtypeRelation(type, functionType);
+      int maybeSubtype =
+          compiler.types.computeSubtypeRelation(type, functionType);
       if (maybeSubtype == Types.IS_SUBTYPE) {
         functionTypeMap[functionType] = true;
       } else if (maybeSubtype == Types.MAYBE_SUBTYPE) {
@@ -285,7 +285,7 @@ class TypeTestEmitter extends CodeEmitterHelper {
       if (destination != outputUnit) continue;
       // TODO(9556).  The properties added to 'holder' should be generated
       // directly as properties of the class object, not added later.
-      String holder = namer.isolateAccess(backend.getImplementationClass(cls));
+      String holder = namer.isolateAccess(cls);
       for (TypeCheck check in typeChecks[cls]) {
         ClassElement cls = check.cls;
         buffer.write('$holder.${namer.operatorIs(cls)}$_=${_}true$N');
@@ -313,7 +313,7 @@ class TypeTestEmitter extends CodeEmitterHelper {
     Set<ClassElement> result = new Set<ClassElement>();
     for (ClassElement cls in typeChecks) {
       for (TypeCheck check in typeChecks[cls]) {
-        result.add(backend.getImplementationClass(cls));
+        result.add(cls);
         break;
       }
     }
@@ -344,9 +344,7 @@ class TypeTestEmitter extends CodeEmitterHelper {
     rti.getRequiredArgumentClasses(backend).forEach((ClassElement c) {
       // Types that we represent with JS native types (like int and String) do
       // not need a class definition as we use the interceptor classes instead.

[karlklose, 2014/04/28 14:04:25]

Update or remove comment.

If you remove it, rewrite as

  rti.getRequiredArgumentClasses(backend)
     .forEach(addClassWithSuperclasses)

[floitsch, 2014/04/30 19:04:38]

Done.

-      if (!rti.isJsNative(c)) {
-        addClassWithSuperclasses(c);
-      }
+      addClassWithSuperclasses(c);
     });
 
     // 2.  Add classes that are referenced by substitutions in object checks and