Use .callMethod instead of LocalFunctionElement as key in inference

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 '../js_backend/backend.dart' show JavaScriptBackend;
 import '../types/types.dart' show TypeMask;
 import '../universe/selector.dart' show Selector;
 import 'debug.dart' as debug;
 import 'inferrer_engine.dart';
 import 'node_tracer.dart';
 import 'type_graph_nodes.dart';
 
 class ClosureTracerVisitor extends TracerVisitor {
-  final Iterable<FunctionElement> tracedElements;
+  final Iterable<MethodElement> tracedElements;
   final List<CallSiteTypeInformation> _callsToAnalyze =
       new List<CallSiteTypeInformation>();
 
   ClosureTracerVisitor(this.tracedElements, ApplyableTypeInformation tracedType,
       InferrerEngine inferrer)
       : super(tracedType, inferrer);
 
   ApplyableTypeInformation get tracedType => super.tracedType;
 
   void run() {
     analyze();
     if (!continueAnalyzing) return;
     _callsToAnalyze.forEach(_analyzeCall);
-    for (FunctionElement e in tracedElements) {
+    for (MethodElement e in tracedElements) {
       e.functionSignature.forEachParameter((Element parameter) {
         ElementTypeInformation info =
             inferrer.types.getInferredTypeOfParameter(parameter);
         info.disableInferenceForClosures = false;
       });
     }
   }
 
   void _tagAsFunctionApplyTarget([String reason]) {
     tracedType.mightBePassedToFunctionApply = true;
     if (debug.VERBOSE) {
       print("Closure $tracedType might be passed to apply: $reason");
     }
   }
 
   void _registerCallForLaterAnalysis(CallSiteTypeInformation info) {
     _callsToAnalyze.add(info);
   }
 
   void _analyzeCall(CallSiteTypeInformation info) {
     Selector selector = info.selector;
     TypeMask mask = info.mask;
-    tracedElements.forEach((FunctionElement functionElement) {
+    tracedElements.forEach((MethodElement functionElement) {
       if (!selector.callStructure
           .signatureApplies(functionElement.parameterStructure)) {
         return;
       }
       inferrer.updateParameterAssignments(
           info, functionElement, info.arguments, selector, mask,
           remove: false, addToQueue: false);
     });
   }
 
@@ skipping 57 matching lines @@
       }
     } else if (info.selector.isGetter &&
         info.selector.memberName == Names.call) {
       // We are potentially tearing off ourself here
       addNewEscapeInformation(info);
     }
   }
 }
 
 class StaticTearOffClosureTracerVisitor extends ClosureTracerVisitor {
-  StaticTearOffClosureTracerVisitor(tracedElement, tracedType, inferrer)
+  StaticTearOffClosureTracerVisitor(
+      MethodElement tracedElement, tracedType, inferrer)
       : super([tracedElement], tracedType, inferrer);
 
   @override
   visitStaticCallSiteTypeInformation(StaticCallSiteTypeInformation info) {
     super.visitStaticCallSiteTypeInformation(info);
     if (info.calledElement == tracedElements.first &&
         info.selector != null &&
         info.selector.isGetter) {
       addNewEscapeInformation(info);
     }
   }
 }