mash: Migrate wallpaper controllers to ash/common.

ash/aura/wm_root_window_controller_aura.cc

 // Copyright 2016 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/aura/wm_root_window_controller_aura.h"
 
 #include "ash/aura/wm_shelf_aura.h"
 #include "ash/aura/wm_shell_aura.h"
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/shelf/shelf_widget.h"
@@ skipping 89 matching lines @@
                                        ->FindTargetForEvent(root, &test_event);
   return WmWindowAura::Get(static_cast<aura::Window*>(event_handler));
 }
 
 gfx::Point WmRootWindowControllerAura::GetLastMouseLocationInRoot() {
   return root_window_controller_->GetHost()
       ->dispatcher()
       ->GetLastMouseLocationInRoot();
 }
 
+void WmRootWindowControllerAura::OnInitialWallpaperAnimationStarted() {
+  root_window_controller_->OnInitialWallpaperAnimationStarted();
+  WmRootWindowController::OnInitialWallpaperAnimationStarted();
+}
+
+void WmRootWindowControllerAura::OnWallpaperAnimationFinished(
+    views::Widget* widget) {
+  root_window_controller_->OnWallpaperAnimationFinished(widget);
+  WmRootWindowController::OnWallpaperAnimationFinished(widget);
+}
+
 }  // namespace ash