Implementation for switching between recently used tabs using ctrl tilde or quoteleft.

chrome/browser/ui/browser.h

 // Copyright (c) 2012 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_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 548 matching lines @@
   void CloseWindow();
   void NewTab();
   void CloseTab();
   void SelectNextTab();
   void SelectPreviousTab();
   void OpenTabpose();
   void MoveTabNext();
   void MoveTabPrevious();
   void SelectNumberedTab(int index);
   void SelectLastTab();
+  void SelectNextMRUTab();
   void DuplicateTab();
   void WriteCurrentURLToClipboard();
   void ConvertPopupToTabbedBrowser();
   // In kiosk mode, the first toggle is valid, the rest is discarded.
   void ToggleFullscreenMode();
   // See the description of
   // FullscreenController::ToggleFullscreenModeWithExtension.
   void ToggleFullscreenModeWithExtension(const GURL& extension_url);
 #if defined(OS_MACOSX)
   void TogglePresentationMode();
@@ skipping 933 matching lines @@
   bool window_has_shown_;
 
   // Currently open color chooser. Non-NULL after OpenColorChooser is called and
   // before DidEndColorChooser is called.
   scoped_ptr<content::ColorChooser> color_chooser_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_