Move common identifiers, names and selectors to a separate library.

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.
 
 part of type_graph_inferrer;
 
 class ClosureTracerVisitor extends TracerVisitor<ApplyableTypeInformation> {
   final Iterable<FunctionElement> tracedElements;
   final List<CallSiteTypeInformation> callsToAnalyze =
       new List<CallSiteTypeInformation>();
@@ skipping 83 matching lines @@
         if (!info.targets.every((element) => element.isFunction)) {
           bailout('Passed to a closure');
         }
         if (info.targets.any(checkIfFunctionApply)) {
           tagAsFunctionApplyTarget("dynamic call");
         }
       } else if (info.targets.any((element) => checkIfCurrentUser(element))) {
         registerCallForLaterAnalysis(info);
       }
     } else if (info.selector.isGetter &&
-        info.selector.name == Compiler.CALL_OPERATOR_NAME) {
+        info.selector.memberName == Names.call) {
       // We are potentially tearing off ourself here
       addNewEscapeInformation(info);
     }
   }
 }
 
 class StaticTearOffClosureTracerVisitor extends ClosureTracerVisitor {
   StaticTearOffClosureTracerVisitor(tracedElement, tracedType, inferrer)
       : super([tracedElement], tracedType, inferrer);
 
   visitStaticCallSiteTypeInformation(StaticCallSiteTypeInformation info) {
     super.visitStaticCallSiteTypeInformation(info);
     if (info.calledElement == tracedElements.first
         && info.selector != null
         && info.selector.isGetter) {
       addNewEscapeInformation(info);
     }
   }
 }