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

chrome/browser/ui/tab_contents/tab_contents_wrapper_delegate.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_UI_TAB_CONTENTS_TAB_CONTENTS_WRAPPER_DELEGATE_H_
 #define CHROME_BROWSER_UI_TAB_CONTENTS_TAB_CONTENTS_WRAPPER_DELEGATE_H_
 #pragma once
 
 #include "base/basictypes.h"
+#include "webkit/glue/window_open_disposition.h"
 
 class TabContentsWrapper;
 struct WebApplicationInfo;
 
 // Objects implement this interface to get notified about changes in the
 // TabContentsWrapper and to provide necessary functionality.
 class TabContentsWrapperDelegate {
  public:
   // Notification that the starredness of the current URL changed.
   virtual void URLStarredChanged(TabContentsWrapper* source, bool starred) = 0;
 
   // Notification that a user's request to install an application has completed.
   virtual void OnDidGetApplicationInfo(TabContentsWrapper* source,
                                        int32 page_id);
 
   // Notification when an application programmatically requests installation.
   virtual void OnInstallApplication(TabContentsWrapper* source,
                                     const WebApplicationInfo& app_info);
 
   virtual void SwapTabContents(TabContentsWrapper* old_tc,
                                TabContentsWrapper* new_tc) = 0;
 
+  // Navigation interface to supoprt disposition.
+  virtual void GoBack(WindowOpenDisposition disposition) = 0;
+  virtual void GoForward(WindowOpenDisposition disposition) = 0;
+
  protected:
   virtual ~TabContentsWrapperDelegate();
 };
 
 #endif  // CHROME_BROWSER_UI_TAB_CONTENTS_TAB_CONTENTS_WRAPPER_DELEGATE_H_