dart2js: Store mapTypeToInterceptor in embedded global.

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 752 matching lines @@
   }
 
   void emitStaticNonFinalFieldInitializations(CodeBuffer buffer,
                                               OutputUnit outputUnit) {
     JavaScriptConstantCompiler handler = backend.constants;
     Iterable<VariableElement> staticNonFinalFields =
         handler.getStaticNonFinalFieldsForEmission();
     for (Element element in Elements.sortedByPosition(staticNonFinalFields)) {
       // [:interceptedNames:] is handled in [emitInterceptedNames].
       if (element == backend.interceptedNames) continue;
-      // `mapTypeToInterceptor` is handled in [emitMapTypeToInterceptor].
-      if (element == backend.mapTypeToInterceptor) continue;
       compiler.withCurrentElement(element, () {
         jsAst.Expression initialValue;
         if (outputUnit !=
             compiler.deferredLoadTask.outputUnitForElement(element)) {
           if (outputUnit == compiler.deferredLoadTask.mainOutputUnit) {
             // In the main output-unit we output a stub initializer for deferred
             // variables, such that `isolateProperties` stays a fast object.
             initialValue = jsAst.number(0);
           } else {
             // Don't output stubs outside the main output file.
@@ skipping 1248 matching lines @@
     for (Element element in compiler.enqueuer.codegen.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
 
         nativeEmitter.cachedBuilders.remove(element.enclosingClass);
 
       }
     }
   }
 }