Add ShellDelegate, MediaDelegate and KeyboardUI stubs to mus ash

ash/accelerators/accelerator_controller.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/accelerators/accelerator_controller.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <utility>
 
 #include "ash/accelerators/accelerator_commands.h"
 #include "ash/accelerators/debug_commands.h"
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/accessibility_types.h"
 #include "ash/common/ash_switches.h"
 #include "ash/common/focus_cycler.h"
+#include "ash/common/gpu_support.h"
 #include "ash/common/media_delegate.h"
 #include "ash/common/multi_profile_uma.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/shelf_model.h"
 #include "ash/common/shell_delegate.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/system/brightness_control_delegate.h"
 #include "ash/common/system/keyboard_brightness_control_delegate.h"
 #include "ash/common/system/status_area_widget.h"
 #include "ash/common/system/system_notifier.h"
 #include "ash/common/system/tray/system_tray.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/system_tray_notifier.h"
 #include "ash/common/system/volume_control_delegate.h"
 #include "ash/common/system/web_notification/web_notification_tray.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm/overview/window_selector_controller.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_event.h"
 #include "ash/common/wm_shell.h"
 #include "ash/debug.h"
 #include "ash/display/window_tree_host_manager.h"
-#include "ash/gpu_support.h"
 #include "ash/ime_control_delegate.h"
 #include "ash/magnifier/magnification_controller.h"
 #include "ash/magnifier/partial_magnification_controller.h"
 #include "ash/new_window_delegate.h"
 #include "ash/root_window_controller.h"
 #include "ash/rotator/screen_rotation_animator.h"
 #include "ash/rotator/window_rotation.h"
 #include "ash/screen_util.h"
 #include "ash/screenshot_delegate.h"
 #include "ash/shelf/shelf.h"
@@ skipping 1356 matching lines @@
   if (wm_shell->mru_window_tracker()->BuildMruWindowList().empty() &&
       actions_needing_window_.find(action) != actions_needing_window_.end()) {
     wm_shell->GetAccessibilityDelegate()->TriggerAccessibilityAlert(
         A11Y_ALERT_WINDOW_NEEDED);
     return RESTRICTION_PREVENT_PROCESSING_AND_PROPAGATION;
   }
   return RESTRICTION_NONE;
 }
 
 }  // namespace ash