Remove --ash-disable-overview-mode

ash/accelerators/accelerator_commands.cc

 // Copyright 2013 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 "ash/accelerators/accelerator_commands.h"
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
-#include "ash/wm/window_cycle_controller.h"
+#include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "base/metrics/user_metrics.h"
 
 namespace ash {
 namespace accelerators {
 
 bool ToggleMinimized() {
   aura::Window* window = wm::GetActiveWindow();
   // Attempt to restore the window that would be cycled through next from
   // the launcher when there is no active window.
   if (!window) {
-    ash::Shell::GetInstance()->window_cycle_controller()->
-        HandleCycleWindow(WindowCycleController::FORWARD, false);
+    MruWindowTracker::WindowList mru_windows(
+        Shell::GetInstance()->mru_window_tracker()->BuildMruWindowList());
+    if (!mru_windows.empty())
+      wm::GetWindowState(mru_windows.front())->Activate();
     return true;
   }
   wm::WindowState* window_state = wm::GetWindowState(window);
   if (!window_state->CanMinimize())
     return false;
   window_state->Minimize();
   return true;
 }
 
 void ToggleMaximized() {
   wm::WindowState* window_state = wm::GetActiveWindowState();
   if (!window_state)
     return;
   base::RecordAction(base::UserMetricsAction("Accel_Toggle_Maximized"));
   window_state->OnWMEvent(wm::TOGGLE_MAXIMIZE);
 }
 
 void ToggleFullscreen() {
   wm::WindowState* window_state = wm::GetActiveWindowState();
   if (window_state)
     window_state->ToggleFullscreen();
 }
 
 }  // namespace accelerators
 }  // namespace ash