dart2js cps_ir: Use interceptors for is-checks.

pkg/compiler/lib/src/js_backend/codegen/glue.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library code_generator_dependencies;
 
 import '../js_backend.dart';
 import '../../common/registry.dart' show
     Registry;
+import '../../common/codegen.dart' show
+    CodegenRegistry;
 import '../../compiler.dart' show
     Compiler;
 import '../../constants/values.dart';
 import '../../dart_types.dart' show
     DartType,
     TypeVariableType,
     InterfaceType;
 import '../../enqueue.dart' show
     CodegenEnqueuer;
 import '../../elements/elements.dart';
 import '../../js_emitter/js_emitter.dart';
 import '../../js/js.dart' as js;
+import '../../native/native.dart' show NativeBehavior;
 import '../../universe/selector.dart' show
     Selector;
 import '../../world.dart' show
     ClassWorld;
 
 
 /// Encapsulates the dependencies of the function-compiler to the compiler,
 /// backend and emitter.
 // TODO(sigurdm): Should be refactored when we have a better feeling for the
 // interface.
@@ skipping 87 matching lines @@
   }
 
   bool isInterceptorClass(ClassElement element) {
     return element.isSubclassOf(_backend.jsInterceptorClass);
   }
 
   Set<ClassElement> getInterceptedClassesOn(Selector selector) {
     return _backend.getInterceptedClassesOn(selector.name);
   }
 
+  Set<ClassElement> get interceptedClasses {
+    return _backend.interceptedClasses;
+  }
+
   void registerSpecializedGetInterceptor(Set<ClassElement> classes) {
     _backend.registerSpecializedGetInterceptor(classes);
   }
 
   js.Expression constructorAccess(ClassElement element) {
     return _backend.emitter.constructorAccess(element);
   }
 
   js.Name instanceFieldPropertyName(Element field) {
     return _namer.instanceFieldPropertyName(field);
@@ skipping 82 matching lines @@
     ClassWorld classWorld = _compiler.world;
     if (classWorld.isUsedAsMixin(cls)) return true;
 
     Iterable<ClassElement> subclasses = _compiler.world.strictSubclassesOf(cls);
     return subclasses.any((ClassElement subclass) {
       return !_backend.rti.isTrivialSubstitution(subclass, cls);
     });
   }
 
   js.Expression generateTypeRepresentation(DartType dartType,
-                                           List<js.Expression> arguments) {
+                                           List<js.Expression> arguments,
+                                           CodegenRegistry registry) {
     int variableIndex = 0;
     js.Expression representation = _backend.rti.getTypeRepresentation(
         dartType,
         (_) => arguments[variableIndex++]);
     assert(variableIndex == arguments.length);
+    // Representation contains JavaScript Arrays.
+    registry.registerInstantiatedClass(_backend.jsArrayClass);
     return representation;
   }
 
   void registerIsCheck(DartType type, Registry registry) {
     _enqueuer.registerIsCheck(type);
     _backend.registerIsCheckForCodegen(type, _enqueuer, registry);
   }
 
   js.Name getTypeTestTag(DartType type) {
     return _backend.namer.operatorIsType(type);
   }
 
   js.Name getTypeSubstitutionTag(ClassElement element) {
     return _backend.namer.substitutionName(element);
   }
 
   bool operatorEqHandlesNullArgument(FunctionElement element) {
     return _backend.operatorEqHandlesNullArgument(element);
   }
 
   bool hasStrictSubtype(ClassElement element) {
     return _compiler.world.hasAnyStrictSubtype(element);
   }
 
+  ClassElement get jsFixedArrayClass => _backend.jsFixedArrayClass;
   ClassElement get jsExtendableArrayClass => _backend.jsExtendableArrayClass;
+  ClassElement get jsUnmodifiableArrayClass =>
+      _backend.jsUnmodifiableArrayClass;
   ClassElement get jsMutableArrayClass => _backend.jsMutableArrayClass;
 
   bool isStringClass(ClassElement classElement) =>
       classElement == _backend.jsStringClass ||
       classElement == _compiler.stringClass;
 
   bool isBoolClass(ClassElement classElement) =>
       classElement == _backend.jsBoolClass ||
       classElement == _compiler.boolClass;
+
+  // TODO(sra): Should this be part of CodegenRegistry?
+  void registerNativeBehavior(NativeBehavior nativeBehavior, node) {
+    if (nativeBehavior == null) return;
+    _enqueuer.nativeEnqueuer.registerNativeBehavior(nativeBehavior, node);
+  }
 }