dart2js: Make usage of names more consistent between compiler and runtime.

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 361 matching lines @@
     //    constructor.
     // For engines where we have access to the '__proto__' we can manipulate
     // the object literal directly. For other engines we have to create a new
     // object and copy over the members.
 
     String reflectableField = namer.reflectableField;
     jsAst.Expression allClassesAccess =
         generateEmbeddedGlobalAccess(embeddedNames.ALL_CLASSES);
     jsAst.Expression metadataAccess =
         generateEmbeddedGlobalAccess(embeddedNames.METADATA);
+    String signaturePropertyName = namer.operatorSignature;
 
     return js('''
       function(collectedClasses, isolateProperties, existingIsolateProperties) {
         var pendingClasses = Object.create(null);
         var allClasses = #allClasses;
         var constructors;
 
         if (#debugFastObjects)
           print("Number of classes: " +
               Object.getOwnPropertyNames(\$\$).length);
@@ skipping 27 matching lines @@
               classData = fields = classData[0];
             }
           var s = fields.split(";");
           fields = s[1] == "" ? [] : s[1].split(",");
           supr = s[0];
           split = supr.split(":");
           if (split.length == 2) {
             supr = split[0];
             var functionSignature = split[1];
             if (functionSignature)
-              desc.\$signature = (function(s) {
+              desc.$signaturePropertyName = (function(s) {
                   return function(){ return #metadata[s]; };
                 })(functionSignature);
           }
 
           if (#needsMixinSupport)
             if (supr && supr.indexOf("+") > 0) {
               s = supr.split("+");
               supr = s[0];
               var mixin = collectedClasses[s[1]];
               if (mixin instanceof Array) mixin = mixin[1];
@@ skipping 1570 matching lines @@
     for (Element element in compiler.enqueuer.codegen.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
 
         nativeEmitter.cachedBuilders.remove(element.enclosingClass);
 
       }
     }
   }
 }