Refactor most recently used window tracking into a separate class.

ash/shell.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 "ash/shell.h"
 
 #include <algorithm>
 #include <string>
 
 #include "ash/accelerators/focus_manager_factory.h"
@@ skipping 32 matching lines @@
 #include "ash/wm/ash_focus_rules.h"
 #include "ash/wm/ash_native_cursor_manager.h"
 #include "ash/wm/base_layout_manager.h"
 #include "ash/wm/capture_controller.h"
 #include "ash/wm/coordinate_conversion.h"
 #include "ash/wm/custom_frame_view_ash.h"
 #include "ash/wm/event_client_impl.h"
 #include "ash/wm/event_rewriter_event_filter.h"
 #include "ash/wm/lock_state_controller.h"
 #include "ash/wm/lock_state_controller_impl2.h"
+#include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/overlay_event_filter.h"
 #include "ash/wm/power_button_controller.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/resize_shadow_controller.h"
 #include "ash/wm/root_window_layout_manager.h"
 #include "ash/wm/screen_dimmer.h"
 #include "ash/wm/session_state_controller_impl.h"
 #include "ash/wm/system_gesture_event_filter.h"
 #include "ash/wm/system_modal_container_event_filter.h"
 #include "ash/wm/system_modal_container_layout_manager.h"
@@ skipping 234 matching lines @@
   capture_controller_.reset();
   nested_dispatcher_controller_.reset();
   user_action_client_.reset();
   visibility_controller_.reset();
   launcher_delegate_.reset();
   launcher_model_.reset();
   video_detector_.reset();
 
   power_button_controller_.reset();
   lock_state_controller_.reset();
+  mru_window_tracker_.reset();
 
   // This also deletes all RootWindows. Note that we invoke Shutdown() on
   // DisplayController before resetting |display_controller_|, since destruction
   // of its owned RootWindowControllers relies on the value.
   display_controller_->Shutdown();
   display_controller_.reset();
   screen_position_controller_.reset();
 
   // Delete the activation controller after other controllers and launcher
   // because they might have registered ActivationChangeObserver.
@@ skipping 235 matching lines @@
   // TODO(oshima): Move as many controllers before creating
   // RootWindowController as possible.
   visibility_controller_.reset(new AshVisibilityController);
   user_action_client_.reset(delegate_->CreateUserActionClient());
   window_modality_controller_.reset(
       new views::corewm::WindowModalityController);
   AddPreTargetHandler(window_modality_controller_.get());
 
   magnification_controller_.reset(
       MagnificationController::CreateInstance());
+  mru_window_tracker_.reset(new MruWindowTracker(activation_client_));
 
   partial_magnification_controller_.reset(
       new PartialMagnificationController());
 
   high_contrast_controller_.reset(new HighContrastController);
   video_detector_.reset(new VideoDetector);
-  window_cycle_controller_.reset(new WindowCycleController(activation_client_));
+  window_cycle_controller_.reset(new WindowCycleController());
 
   tooltip_controller_.reset(new views::corewm::TooltipController(
                                 gfx::SCREEN_TYPE_ALTERNATE));
   AddPreTargetHandler(tooltip_controller_.get());
 
   event_client_.reset(new internal::EventClientImpl);
 
   // This controller needs to be set before SetupManagedWindowMode.
   desktop_background_controller_.reset(new DesktopBackgroundController());
   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
@@ skipping 335 matching lines @@
 
   if (nested_dispatcher_controller_) {
     aura::client::SetDispatcherClient(root_window,
                                       nested_dispatcher_controller_.get());
   }
   if (user_action_client_)
     aura::client::SetUserActionClient(root_window, user_action_client_.get());
 
   controller->Init(first_run_after_boot);
 
-  window_cycle_controller_->OnRootWindowAdded(root_window);
+  mru_window_tracker_->OnRootWindowAdded(root_window);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Shell, private:
 
 bool Shell::CanWindowReceiveEvents(aura::Window* window) {
   RootWindowControllerList controllers = GetAllRootWindowControllers();
   for (RootWindowControllerList::iterator iter = controllers.begin();
        iter != controllers.end(); ++iter) {
     internal::SystemModalContainerLayoutManager* layout_manager =
@@ skipping 21 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // Shell, aura::client::ActivationChangeObserver implementation:
 
 void Shell::OnWindowActivated(aura::Window* gained_active,
                               aura::Window* lost_active) {
   if (gained_active)
     active_root_window_ = gained_active->GetRootWindow();
 }
 
 }  // namespace ash