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 259099284eeda44650e8e3a86d02cd21445b61d3..7213efa25562cc30fc428ab940ac6eb7d56b1226 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -130,6 +130,7 @@
 #include "chrome/browser/ui/tabs/dock_info.h"
 #include "chrome/browser/ui/tabs/tab_finder.h"
 #include "chrome/browser/ui/tabs/tab_menu_model.h"
+#include "chrome/browser/ui/tabs/tab_mru_list_manager.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/web_applications/web_app_ui.h"
 #include "chrome/browser/ui/webui/feedback_ui.h"
@@ -374,7 +375,10 @@ Browser::Browser(Type type, Profile* profile)
       bookmark_bar_state_(BookmarkBar::HIDDEN),
       window_has_shown_(false) {
   tab_strip_model_->AddObserver(this);
-
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableTabMRUSwitch)) {
+   tab_mru_list_manager_.reset(new TabMRUListManager(tab_strip_model_.get()));

[sky, 2012/06/11 18:21:51]

spacing is wrong here.

[NaveenBobbili (Motorola), 2012/06/13 06:07:32]

Done.

+  }
   toolbar_model_.reset(new ToolbarModel(toolbar_model_delegate_.get()));
 
   registrar_.Add(this, content::NOTIFICATION_SSL_VISIBLE_STATE_CHANGED,
@@ -1461,6 +1465,13 @@ void Browser::SelectLastTab() {
   tab_strip_model_->SelectLastTab();
 }
 
+void Browser::SelectNextMRUTab() {

[sky, 2012/06/11 18:21:51]

Isn't this more of selecting the previous mru tab, not the next mru tab?

[NaveenBobbili (Motorola), 2012/06/13 06:07:32]

Done.

+  content::RecordAction(UserMetricsAction("SelectNextMRUTab"));
+  TabContentsWrapper* contents = tab_mru_list_manager_->GetNextMRUTab();
+  if (contents)
+    ActivateTabAt(tab_strip_model_->GetIndexOfTabContents(contents), true);
+}
+
 void Browser::DuplicateTab() {
   content::RecordAction(UserMetricsAction("Duplicate"));
   DuplicateContentsAt(active_index());
@@ -2574,6 +2585,7 @@ void Browser::ExecuteCommandWithDisposition(
     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;
@@ -4079,6 +4091,11 @@ void Browser::InitCommandState() {
   command_updater_.UpdateCommandEnabled(IDC_SELECT_NEXT_TAB, normal_window);
   command_updater_.UpdateCommandEnabled(IDC_SELECT_PREVIOUS_TAB,
                                         normal_window);
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableTabMRUSwitch)) {
+    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);