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

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
diff --git a/chrome/browser/ui/browser.h b/chrome/browser/ui/browser.h
index 315af0225691f68d5a4d55e268e8a6764caa80cd..aa770d4e4c7062a68465770809e08ae795fe6d9f 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -30,6 +30,7 @@
 #include "chrome/browser/ui/search_engines/search_engine_tab_helper_delegate.h"
 #include "chrome/browser/ui/select_file_dialog.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
+#include "chrome/browser/ui/tabs/mru_tab_controller.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "chrome/browser/ui/toolbar/toolbar_model.h"
 #include "chrome/browser/ui/zoom/zoom_observer.h"
@@ -51,6 +52,7 @@ class BrowserTabRestoreServiceDelegate;
 class BrowserWindow;
 class FindBarController;
 class FullscreenController;
+class MRUTabController;
 class PrefService;
 class Profile;
 class SkBitmap;
@@ -484,6 +486,10 @@ class Browser : public TabStripModelObserver,
     return extension_window_controller_.get();
   }
 
+  MRUTabController* mru_tab_controller() const {
+    return mru_tab_controller_.get();
+  }
+
  protected:
   // Funnel for the factory method in BrowserWindow. This allows subclasses to
   // set their own window.
@@ -814,6 +820,8 @@ class Browser : public TabStripModelObserver,
   scoped_ptr<TabStripModelDelegate> tab_strip_model_delegate_;
   scoped_ptr<TabStripModel> tab_strip_model_;
 
+  scoped_ptr<MRUTabController> mru_tab_controller_;
+
   // The application name that is also the name of the window to the shell.
   // This name should be set when:
   // 1) we launch an application via an application shortcut or extension API.