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

chrome/browser/tabs/tab_strip_model.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_TABS_TAB_STRIP_MODEL_H_
 #define CHROME_BROWSER_TABS_TAB_STRIP_MODEL_H_
 #pragma once
 
 #include <vector>
+#include <list>
 
 #include "base/observer_list.h"
+#include "chrome/browser/tabs/tab_mru_list_manager.h"
 #include "chrome/browser/tabs/tab_strip_model_observer.h"
 #include "chrome/browser/tabs/tab_strip_selection_model.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/common/page_transition_types.h"
 
 class Profile;
 class TabContentsWrapper;
 class TabStripModelDelegate;
 class TabStripModelOrderController;
@@ skipping 406 matching lines @@
 
   // Closes the selected tabs.
   void CloseSelectedTabs();
 
   // Select adjacent tabs
   void SelectNextTab();
   void SelectPreviousTab();
 
   // Selects the last tab in the tab strip.
   void SelectLastTab();
+  // Selectd the next tab in MRU list.
+  void SelectNextMRUTab();
 
   // Swap adjacent tabs.
   void MoveTabNext();
   void MoveTabPrevious();
 
   // Notifies the observers that the active/foreground tab at |index| was
   // reselected (ie - it was already active and was clicked again).
   void ActiveTabClicked(int index);
 
   // View API //////////////////////////////////////////////////////////////////
@@ skipping 143 matching lines @@
   // fall back to check the group relationship as well.
   struct TabContentsData;
   static bool OpenerMatches(const TabContentsData* data,
                             const content::NavigationController* opener,
                             bool use_group);
 
   // Sets the group/opener of any tabs that reference |tab| to NULL.
   void ForgetOpenersAndGroupsReferencing(
       const content::NavigationController* tab);
 
+  // Tab Strip Most Recently used list management functions.
+  void TabMRUListRemoveContents(TabContentsWrapper* removed_contents);
+  void TabMRUListActivateContents(TabContentsWrapper* new_contents);
+  void TabMRUListReplaceContents(TabContentsWrapper* old_contents,
+                                 TabContentsWrapper* new_contents);
+
   // Our delegate.
   TabStripModelDelegate* delegate_;
 
   // A hunk of data representing a TabContentsWrapper and (optionally) the
   // NavigationController that spawned it. This memory only sticks around while
   // the TabContentsWrapper is in the current TabStripModel, unless otherwise
   // specified in code.
   struct TabContentsData {
     explicit TabContentsData(TabContentsWrapper* a_contents)
         : contents(a_contents),
@@ skipping 60 matching lines @@
   // A profile associated with this TabStripModel, used when creating new Tabs.
   Profile* profile_;
 
   // True if all tabs are currently being closed via CloseAllTabs.
   bool closing_all_;
 
   // An object that determines where new Tabs should be inserted and where
   // selection should move when a Tab is closed.
   TabStripModelOrderController* order_controller_;
 
+  // List manager that maintains the tab indices in the most recently
+  // visited order.
+  TabMRUListManager tab_mru_list_manager_;
+
   // Our observers.
   typedef ObserverList<TabStripModelObserver> TabStripModelObservers;
   TabStripModelObservers observers_;
 
   // A scoped container for notification registries.
   content::NotificationRegistrar registrar_;
 
   TabStripSelectionModel selection_model_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(TabStripModel);
 };
 
 #endif  // CHROME_BROWSER_TABS_TAB_STRIP_MODEL_H_