added CTRL+Click and SHIFT+Click handler for context menu, Back and Forward.

chrome/browser/tab_contents/render_view_context_menu.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_TAB_CONTENTS_RENDER_VIEW_CONTEXT_MENU_H_
 #define CHROME_BROWSER_TAB_CONTENTS_RENDER_VIEW_CONTEXT_MENU_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 29 matching lines @@
 
   virtual ~RenderViewContextMenu();
 
   // Initializes the context menu.
   void Init();
 
   // SimpleMenuModel::Delegate implementation.
   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
   virtual void ExecuteCommand(int command_id) OVERRIDE;
+  virtual void ExecuteCommandWithFlags(int command_id, int flags) OVERRIDE;
   virtual void MenuWillShow() OVERRIDE;
   virtual void MenuClosed() OVERRIDE;
 
  protected:
   void InitMenu();
 
   // Platform specific functions.
   virtual void PlatformInit() = 0;
   virtual bool GetAcceleratorForCommandId(
       int command_id,
@@ skipping 92 matching lines @@
   GURL selection_navigation_url_;
 
   ui::SimpleMenuModel spellcheck_submenu_model_;
   ui::SimpleMenuModel bidi_submenu_model_;
   ScopedVector<ui::SimpleMenuModel> extension_menu_models_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewContextMenu);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_RENDER_VIEW_CONTEXT_MENU_H_