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 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;

[Ben Goodger (Google), 2011/05/31 16:00:00]

I am not sure why you are adding these methods to the delegate. It doesn't look
like code in TCW is having to call them. Rather, it's all high level browser
code.

[shinyak (Google), 2011/06/09 02:29:04]

Since RenderViewContextMenu, which will call GoBack and GoForward, uses some
delegates instead of Browser itself. So I added these methods here. But
currently I don't think here is appropriate. TabContents seems more appropriate
to have these methods, because it already has OpenURLFromTab, which is a kind of
navigation method. So I moved these functions to TabContentsDelegate.

On 2011/05/31 16:00:00, Ben Goodger wrote:

+  virtual void GoForward(WindowOpenDisposition disposition) = 0;
+  virtual bool NavigateToIndexWithDisposition(int index,
+                                              WindowOpenDisposition disp) = 0;
+
  protected:
   virtual ~TabContentsWrapperDelegate();
 };
 
 #endif  // CHROME_BROWSER_UI_TAB_CONTENTS_TAB_CONTENTS_WRAPPER_DELEGATE_H_