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 62 matching lines @@
       int *index);
   // This will set the icon on the most recently-added item in the menu_model_.
   void SetExtensionIcon(const std::string& extension_id);
 
   // Opens the specified URL string in a new tab.  If |in_current_window| is
   // false, a new window is created to hold the new tab.
   void OpenURL(const GURL& url, const GURL& referrer,
                WindowOpenDisposition disposition,
                PageTransition::Type transition);
 
+  // Open a previous page. |event_flags| is a bitsum of ui::EventFlags.
+  void GoBack(int event_flags);
+
+  // Open a forward page. |event_flags| is a bitsum of ui::EventFlags.
+  void GoForward(int event_flags);
+
   // Copy to the clipboard an image located at a point in the RenderView
   void CopyImageAt(int x, int y);
 
   // Launch the inspector targeting a point in the RenderView
   void Inspect(int x, int y);
 
   // Writes the specified text/url to the system clipboard
   void WriteURLToClipboard(const GURL& url);
 
   void MediaPlayerActionAt(const gfx::Point& location,
@@ skipping 10 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_