isolates refactor: this change introduces 'dart:isolate' as a library. This is a

compiler/java/com/google/dart/compiler/backend/js/GenerateJavascriptAST.java

 // Copyright (c) 2012, 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.
 
 package com.google.dart.compiler.backend.js;
 
 import com.google.common.collect.Lists;
 import com.google.dart.compiler.DartCompilationError;
 import com.google.dart.compiler.DartCompilerContext;
 import com.google.dart.compiler.InternalCompilerException;
@@ skipping 554 matching lines @@
       JsFunction getterFn = AstUtil.newFunction(globalScope, null, null,
           new JsReturn(fnName.makeRef()));
 
       // Declare it.
       JsExpression declStmt = AstUtil.newAssignment(
           getIsolateFactoryGetterName(classElement), getterFn);
       globalBlock.getStatements().add(declStmt.makeStmt());
     }
 
     private boolean isIsolateClass(ClassElement classElement) {
-      InterfaceType classType = classElement.getType();
-      return TypeKind.of(classType) == TypeKind.INTERFACE
-          && typeUtils.isSubtype(classType, typeProvider.getIsolateType());
+      return false;
     }
 
     /**
      * Creates a $getter for a method of a class, returning $method as a closure
      * bound to the current instance if it is an instance method.
      */
     private void generateMethodGetter(MethodElement methodElement) {
       // Generate a getter for method binding to a variable
       boolean isTopLevel = Elements.isTopLevel(methodElement);
       if (methodElement.getModifiers().isGetter() || methodElement.getModifiers().isSetter()) {
@@ skipping 3282 matching lines @@
       JsBlock blockStatics) {
     GenerateJavascriptVisitor generator =
         new GenerateJavascriptVisitor(unit, context, translationContext,
             typeProvider);
     // Generate the Javascript AST.
     node.accept(generator);
     // Set aside the static initializations
     generator.addStaticInitsToBlock(blockStatics);
   }
 }