dart2js: Pass type information to constructor rather than add later.

pkg/compiler/lib/src/js_emitter/full_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.
 
 library dart2js.js_emitter.full_emitter;
 
 import 'dart:collection' show HashMap;
 import 'dart:convert';
 
 import 'package:js_runtime/shared/embedded_names.dart' as embeddedNames;
@@ skipping 865 matching lines @@
     jsAst.Expression leafTagsAccess =
         generateEmbeddedGlobalAccess(embeddedNames.LEAF_TAGS);
     jsAst.Expression finishedClassesAccess =
         generateEmbeddedGlobalAccess(embeddedNames.FINISHED_CLASSES);
     jsAst.Expression cyclicThrow =
         staticFunctionAccess(backend.helpers.cyclicThrowHelper);
     jsAst.Expression laziesAccess =
         generateEmbeddedGlobalAccess(embeddedNames.LAZIES);
 
     return js.statement(
-        '''
+        """
       function init() {
         $isolatePropertiesName = Object.create(null);
         #allClasses = map();
         #getTypeFromName = function(name) {return #allClasses[name];};
         #interceptorsByTag = map();
         #leafTags = map();
         #finishedClasses = map();
 
         if (#needsLazyInitializer) {
           // [staticName] is only provided in non-minified mode. If missing, we
@@ skipping 89 matching lines @@
           }
           Isolate.#functionThatReturnsNullProperty =
               oldIsolate.#functionThatReturnsNullProperty;
           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,
@@ skipping 1143 matching lines @@
     if (cachedElements.isEmpty) return;
     for (Element element in compiler.enqueuer.codegen.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
 
         nativeEmitter.cachedBuilders.remove(element.enclosingClass);
       }
     }
   }
 }