[Refactor] Introduce MediaDelegate

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/accelerator_controller.h"
@@ skipping 18 matching lines @@
 #include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/host/root_window_host_factory.h"
 #include "ash/keyboard_uma_event_filter.h"
 #include "ash/launcher/launcher_delegate.h"
 #include "ash/launcher/launcher_item_delegate.h"
 #include "ash/launcher/launcher_item_delegate_manager.h"
 #include "ash/launcher/launcher_model.h"
 #include "ash/launcher/launcher_model_util.h"
 #include "ash/magnifier/magnification_controller.h"
 #include "ash/magnifier/partial_magnification_controller.h"
+#include "ash/media_delegate.h"
 #include "ash/new_window_delegate.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_ash.h"
 #include "ash/session_state_delegate.h"
 #include "ash/shelf/app_list_shelf_item_delegate.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_factory.h"
 #include "ash/shell_window_ids.h"
@@ skipping 609 matching lines @@
 
   // 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();
 
   keyboard_controller_.reset();
   accessibility_delegate_.reset();
+  new_window_delegate_.reset();
+  media_delegate_.reset();
 
 #if defined(OS_CHROMEOS) && defined(USE_X11)
    if (display_change_observer_)
     output_configurator_->RemoveObserver(display_change_observer_.get());
   if (output_configurator_animation_)
     output_configurator_->RemoveObserver(output_configurator_animation_.get());
   if (display_error_observer_)
     output_configurator_->RemoveObserver(display_error_observer_.get());
   base::MessagePumpX11::Current()->RemoveDispatcherForRootWindow(
       output_configurator());
@@ skipping 157 matching lines @@
   // This controller needs to be set before SetupManagedWindowMode.
   desktop_background_controller_.reset(new DesktopBackgroundController());
   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
 
   // StatusAreaWidget uses Shell's CapsLockDelegate.
   caps_lock_delegate_.reset(delegate_->CreateCapsLockDelegate());
 
   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
+  media_delegate_.reset(delegate_->CreateMediaDelegate());
 
   if (!command_line->HasSwitch(views::corewm::switches::kNoDropShadows)) {
     resize_shadow_controller_.reset(new internal::ResizeShadowController());
     shadow_controller_.reset(
         new views::corewm::ShadowController(activation_client_));
   }
 
   // Create system_tray_notifier_ before the delegate.
   system_tray_notifier_.reset(new ash::SystemTrayNotifier());
 
@@ skipping 130 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // Shell, aura::client::ActivationChangeObserver implementation:
 
 void Shell::OnWindowActivated(aura::Window* gained_active,
                               aura::Window* lost_active) {
   if (gained_active)
     target_root_window_ = gained_active->GetRootWindow();
 }
 
 }  // namespace ash