dart2js: change output so that in stack traces, dart method names get prefixed with 'dart.' instead…

pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.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 dart2js.js_emitter;
 
 // TODO(ahe): Share these with js_helper.dart.
 const FUNCTION_INDEX = 0;
 const NAME_INDEX = 1;
 const CALL_NAME_INDEX = 2;
@@ skipping 35 matching lines @@
       emitter.generateEmbeddedGlobalAccess(embeddedNames.INTERCEPTED_NAMES);
   jsAst.Expression mangledGlobalNamesAccess =
       emitter.generateEmbeddedGlobalAccess(embeddedNames.MANGLED_GLOBAL_NAMES);
   jsAst.Expression mangledNamesAccess =
       emitter.generateEmbeddedGlobalAccess(embeddedNames.MANGLED_NAMES);
   jsAst.Expression librariesAccess =
       emitter.generateEmbeddedGlobalAccess(embeddedNames.LIBRARIES);
   jsAst.Expression metadataAccess =
       emitter.generateEmbeddedGlobalAccess(embeddedNames.METADATA);
 
-  jsAst.Statement header = js.statement('''
-// [map] returns an object literal that V8 shouldn not try to optimize with a
-// hidden class. This prevents a potential performance problem where V8 tries
-// to build a hidden class for an object used as a hashMap.
-// It requires fewer characters to declare a variable as a parameter than
-// with `var`.
-  function map(x){x=Object.create(null);x.x=0;delete x.x;return x}
-''');
-
   jsAst.Statement processClassData = js.statement('''{
   function processClassData(cls, descriptor, processedClasses) {
     var newDesc = {};
     var previousProperty;
     for (var property in descriptor) {
       if (!hasOwnProperty.call(descriptor, property)) continue;
       var firstChar = property.substring(0, 1);
       if (property === "static") {
         processStatics(#embeddedStatics[cls] = descriptor[property], 
                        processedClasses);
@@ skipping 347 matching lines @@
   List<jsAst.Statement> incrementalSupport = <jsAst.Statement>[];
   if (compiler.hasIncrementalSupport) {
     incrementalSupport.add(
         js.statement(
             r'self.$dart_unsafe_eval.addStubs = addStubs;'));
   }
 
   return js('''
 function $parseReflectionDataName(reflectionData) {
   "use strict";
-  #header;
   if (#needsClassSupport) {
     #defineClass;
     #inheritFrom;
     #finishClasses;
     #processClassData;
   }
   #processStatics;
   #addStubs;
   #tearOffCode;
   #incrementalSupport;
   #init;
 }''', {
-      'header': header,
       'defineClass': oldEmitter.defineClassFunction,
       'inheritFrom': oldEmitter.buildInheritFrom(),
       'processClassData': processClassData,
       'processStatics': processStatics,
       'incrementalSupport': incrementalSupport,
       'addStubs': addStubs,
       'tearOffCode': tearOffCode,
       'init': init,
       'finishClasses': finishClasses,
       'needsClassSupport': oldEmitter.needsClassSupport});
@@ skipping 111 matching lines @@
 (function() {
   var result = $array[$index];
   if ($check) {
     throw new Error(
         name + ": expected value of type \'$type\' at index " + ($index) +
         " but got " + (typeof result));
   }
   return result;
 })()''';
 }