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

chrome/browser/ui/browser.cc

 // 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.
 
 #include "chrome/browser/ui/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // OS_WIN
@@ skipping 1867 matching lines @@
     content::RecordAction(UserMetricsAction("SelectNumberedTab"));
     ActivateTabAt(index, true);
   }
 }
 
 void Browser::SelectLastTab() {
   content::RecordAction(UserMetricsAction("SelectLastTab"));
   tab_handler_->GetTabStripModel()->SelectLastTab();
 }
 
+void Browser::SelectNextMRUTab() {
+  content::RecordAction(UserMetricsAction("SelectNextMRUTab"));
+  tab_handler_->GetTabStripModel()->SelectNextMRUTab();
+}
+
 void Browser::DuplicateTab() {
   content::RecordAction(UserMetricsAction("Duplicate"));
   DuplicateContentsAt(active_index());
 }
 
 void Browser::RestoreTab() {
   content::RecordAction(UserMetricsAction("RestoreTab"));
   TabRestoreService* service =
       TabRestoreServiceFactory::GetForProfile(profile_);
   if (!service)
@@ skipping 1344 matching lines @@
     case IDC_INTERNET_OPTIONS:      OpenInternetOptionsDialog();      break;
     case IDC_LANGUAGE_OPTIONS:      OpenLanguageOptionsDialog();      break;
 #endif
 #if defined(OS_CHROMEOS) && defined(USE_AURA)
     case IDC_NEW_CROSH_TAB:         OpenCrosh();                    break;
 #endif
     case IDC_SHOW_SYNC_SETUP:       ShowSyncSetup(SyncPromoUI::SOURCE_MENU);
                                     break;
     case IDC_TOGGLE_SPEECH_INPUT:   ToggleSpeechInput();              break;
 
+    case IDC_SELECT_NEXT_MRU_TAB:   SelectNextMRUTab();               break;
+
     default:
       LOG(WARNING) << "Received Unimplemented Command: " << id;
       break;
   }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // Browser, TabHandlerDelegate implementation:
 
 Profile* Browser::GetProfile() const {
@@ skipping 206 matching lines @@
 
 bool Browser::LargeIconsPermitted() const {
   // We don't show the big icons in tabs for TYPE_EXTENSION_APP windows because
   // for those windows, we already have a big icon in the top-left outside any
   // tab. Having big tab icons too looks kinda redonk.
   return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // Browser, TabStripModelObserver implementation:
-
 void Browser::TabInsertedAt(TabContentsWrapper* contents,
                             int index,
                             bool foreground) {
   SetAsDelegate(contents, this);
   contents->restore_tab_helper()->SetWindowID(session_id());
 
   SyncHistoryWithTabs(index);
 
   // Make sure the loading state is updated correctly, otherwise the throbber
   // won't start if the page is loading.
@@ skipping 1284 matching lines @@
   // Navigation commands
   command_updater_.UpdateCommandEnabled(IDC_HOME, normal_window);
 
   // Window management commands
   // TODO(rohitrao): Disable fullscreen on non-Lion?
   command_updater_.UpdateCommandEnabled(IDC_FULLSCREEN,
       !(is_type_panel() && is_app()));
   command_updater_.UpdateCommandEnabled(IDC_SELECT_NEXT_TAB, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_SELECT_PREVIOUS_TAB,
                                         normal_window);
+  command_updater_.UpdateCommandEnabled(IDC_SELECT_NEXT_MRU_TAB,
+                                        normal_window);
   command_updater_.UpdateCommandEnabled(IDC_MOVE_TAB_NEXT, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_MOVE_TAB_PREVIOUS, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_SELECT_TAB_0, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_SELECT_TAB_1, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_SELECT_TAB_2, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_SELECT_TAB_3, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_SELECT_TAB_4, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_SELECT_TAB_5, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_SELECT_TAB_6, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_SELECT_TAB_7, normal_window);
@@ skipping 893 matching lines @@
     ShowSingletonTabOverwritingNTP(params);
   } else {
     LoginUIServiceFactory::GetForProfile(
         profile()->GetOriginalProfile())->ShowLoginUI(false);
   }
 }
 
 void Browser::ToggleSpeechInput() {
   GetSelectedWebContents()->GetRenderViewHost()->ToggleSpeechInput();
 }