Introduce "CommonElements"

pkg/compiler/lib/src/inferrer/closure_tracer.dart

 // Copyright (c) 2013, 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 compiler.src.inferrer.closure_tracer;
 
 import '../common/names.dart' show Names;
 import '../elements/elements.dart';
 import '../types/types.dart' show TypeMask;
 import '../universe/selector.dart' show Selector;
@@ skipping 76 matching lines @@
         info.arguments != null &&
         info.arguments.contains(currentUser)) {
       _tagAsFunctionApplyTarget("static call");
     }
   }
 
   bool _checkIfCurrentUser(element) =>
       inferrer.types.getInferredTypeOf(element) == currentUser;
 
   bool _checkIfFunctionApply(element) =>
-      compiler.functionApplyMethod == element;
+      compiler.commonElements.isFunctionApplyMethod(element);
 
   @override
   visitDynamicCallSiteTypeInformation(DynamicCallSiteTypeInformation info) {
     super.visitDynamicCallSiteTypeInformation(info);
     if (info.selector.isCall) {
       if (info.arguments.contains(currentUser)) {
         if (!info.targets.every((element) => element.isFunction)) {
           bailout('Passed to a closure');
         }
         if (info.targets.any(_checkIfFunctionApply)) {
@@ skipping 17 matching lines @@
   @override
   visitStaticCallSiteTypeInformation(StaticCallSiteTypeInformation info) {
     super.visitStaticCallSiteTypeInformation(info);
     if (info.calledElement == tracedElements.first &&
         info.selector != null &&
         info.selector.isGetter) {
       addNewEscapeInformation(info);
     }
   }
 }