Revert 216874 - Use overview mode for alt-tab cycling.

ash/accelerators/accelerator_controller.cc

Index: ash/accelerators/accelerator_controller.cc
===================================================================
--- ash/accelerators/accelerator_controller.cc	(revision 216889)
+++ ash/accelerators/accelerator_controller.cc	(working copy)
@@ -94,12 +94,6 @@
   return true;
 }
 
-bool HandleCycleWindowOverviewMRU(WindowSelector::Direction direction) {
-  Shell::GetInstance()->
-      window_selector_controller()->HandleCycleWindow(direction);
-  return true;
-}
-
 void HandleCycleWindowLinear(CycleDirection direction) {
   Shell::GetInstance()->
       window_cycle_controller()->HandleLinearCycleWindow();
@@ -524,19 +518,11 @@
     case CYCLE_BACKWARD_MRU:
       if (key_code == ui::VKEY_TAB)
         shell->delegate()->RecordUserMetricsAction(UMA_ACCEL_PREVWINDOW_TAB);
-      if (CommandLine::ForCurrentProcess()->HasSwitch(
-              switches::kAshEnableOverviewMode)) {
-        return HandleCycleWindowOverviewMRU(WindowSelector::BACKWARD);
-      }
       return HandleCycleWindowMRU(WindowCycleController::BACKWARD,
                                   accelerator.IsAltDown());
     case CYCLE_FORWARD_MRU:
       if (key_code == ui::VKEY_TAB)
         shell->delegate()->RecordUserMetricsAction(UMA_ACCEL_NEXTWINDOW_TAB);
-      if (CommandLine::ForCurrentProcess()->HasSwitch(
-              switches::kAshEnableOverviewMode)) {
-        return HandleCycleWindowOverviewMRU(WindowSelector::FORWARD);
-      }
       return HandleCycleWindowMRU(WindowCycleController::FORWARD,
                                   accelerator.IsAltDown());
     case CYCLE_BACKWARD_LINEAR: