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

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index eb0de467d47c792456f10530ac82a837c5270528..bf3514fe724e2dee451d5e51923a085c828bccf3 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -1885,6 +1885,11 @@ void Browser::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());
@@ -3249,6 +3254,8 @@ void Browser::ExecuteCommandWithDisposition(
                                     break;
     case IDC_TOGGLE_SPEECH_INPUT:   ToggleSpeechInput();              break;
 
+    case IDC_SELECT_NEXT_MRU_TAB:   SelectNextMRUTab();               break;
+
     default:
       LOG(WARNING) << "Received Unimplemented Command: " << id;
       break;
@@ -3475,7 +3482,6 @@ bool Browser::LargeIconsPermitted() const {
 
 ///////////////////////////////////////////////////////////////////////////////
 // Browser, TabStripModelObserver implementation:
-
 void Browser::TabInsertedAt(TabContentsWrapper* contents,
                             int index,
                             bool foreground) {
@@ -4780,6 +4786,8 @@ void Browser::InitCommandState() {
   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);