[debugger] remove GeneratorMirror.prototype.context().

src/debug/mirrors.js

 // Copyright 2006-2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 (function(global, utils) {
 "use strict";
 
 // ----------------------------------------------------------------------------
 // Imports
 
@@ skipping 1416 matching lines @@
 
 
 GeneratorMirror.prototype.func = function() {
   if (!this.func_) {
     this.func_ = MakeMirror(%GeneratorGetFunction(this.value_));
   }
   return this.func_;
 };
 
 
-GeneratorMirror.prototype.context = function() {
-  if (!this.context_) {
-    this.context_ = new ContextMirror(%GeneratorGetContext(this.value_));
-  }
-  return this.context_;
-};
-
-
 GeneratorMirror.prototype.receiver = function() {
   if (!this.receiver_) {
     this.receiver_ = MakeMirror(%GeneratorGetReceiver(this.value_));
   }
   return this.receiver_;
 };
 
 
 /**
  * Base mirror object for properties.
@@ skipping 1587 matching lines @@
 // Functions needed by the debugger runtime.
 utils.InstallFunctions(utils, DONT_ENUM, [
   "ClearMirrorCache", ClearMirrorCache
 ]);
 
 // Export to debug.js
 utils.Export(function(to) {
   to.MirrorType = MirrorType;
 });
 })