dart2js: add type lookup in the new emitter.

pkg/compiler/lib/src/js_emitter/old_emitter/emitter.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.
 
 part of dart2js.js_emitter;
 
 
 class OldEmitter implements Emitter {
   final Compiler compiler;
   final CodeEmitterTask task;
@@ skipping 1006 matching lines @@
     output.addBuffer(jsAst.prettyPrint(invokeMain,
                      compiler, monitor: compiler.dumpInfoTask));
     output.add(N);
     addComment('END invoke [main].', output);
   }
 
   void emitInitFunction(CodeOutput output) {
     String isolate = namer.currentIsolate;
     jsAst.Expression allClassesAccess =
         generateEmbeddedGlobalAccess(embeddedNames.ALL_CLASSES);
+    jsAst.Expression getTypeFromNameAccess =
+        generateEmbeddedGlobalAccess(embeddedNames.GET_TYPE_FROM_NAME);
     jsAst.Expression interceptorsByTagAccess =
         generateEmbeddedGlobalAccess(embeddedNames.INTERCEPTORS_BY_TAG);
     jsAst.Expression leafTagsAccess =
         generateEmbeddedGlobalAccess(embeddedNames.LEAF_TAGS);
     jsAst.Expression finishedClassesAccess =
         generateEmbeddedGlobalAccess(embeddedNames.FINISHED_CLASSES);
     jsAst.Expression cyclicThrow =
         staticFunctionAccess(backend.getCyclicThrowHelper());
     jsAst.Expression laziesAccess =
         generateEmbeddedGlobalAccess(embeddedNames.LAZIES);
 
     jsAst.FunctionDeclaration decl = js.statement('''
       function init() {
         $isolateProperties = Object.create(null);
         #allClasses = Object.create(null);
+        #getTypeFromName = function(name) {return #allClasses[name];};
         #interceptorsByTag = Object.create(null);
         #leafTags = Object.create(null);
         #finishedClasses = Object.create(null);
 
         if (#needsLazyInitializer) {
           $lazyInitializerName = function (prototype, staticName, fieldName,
                                            getterName, lazyValue) {
             if (!#lazies) #lazies = Object.create(null);
             #lazies[fieldName] = getterName;
 
@@ skipping 72 matching lines @@
             Isolate.#makeConstListProperty = oldIsolate.#makeConstListProperty;
           }
           if (#hasIncrementalSupport) {
             Isolate.#lazyInitializerProperty =
                 oldIsolate.#lazyInitializerProperty;
           }
           return Isolate;
       }
 
       }''', {'allClasses': allClassesAccess,
+            'getTypeFromName': getTypeFromNameAccess,
             'interceptorsByTag': interceptorsByTagAccess,
             'leafTags': leafTagsAccess,
             'finishedClasses': finishedClassesAccess,
             'needsLazyInitializer': needsLazyInitializer,
             'lazies': laziesAccess, 'cyclicThrow': cyclicThrow,
             'isolatePropertiesName': namer.isolatePropertiesName,
             'outputContainsConstantList': task.outputContainsConstantList,
             'makeConstListProperty': makeConstListProperty,
             'hasIncrementalSupport': compiler.hasIncrementalSupport,
             'lazyInitializerProperty': lazyInitializerProperty,});
@@ skipping 955 matching lines @@
     for (Element element in compiler.enqueuer.codegen.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
 
         nativeEmitter.cachedBuilders.remove(element.enclosingClass);
 
       }
     }
   }
 }