mash: Migrate wallpaper controllers to ash/common.

chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_browsertest.cc

 // Copyright 2014 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 "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
 
 #include <stddef.h>
 
+#include "ash/common/wallpaper/wallpaper_controller.h"
 #include "ash/common/wm_shell.h"
 #include "ash/display/display_manager.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/ash_test_helper.h"
 #include "ash/test/display_manager_test_api.h"
-#include "ash/wallpaper/wallpaper_controller.h"
-#include "ash/wallpaper/wallpaper_controller_observer.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "base/values.h"
@@ skipping 38 matching lines @@
 
 class WallpaperManagerBrowserTest : public InProcessBrowserTest {
  public:
   WallpaperManagerBrowserTest() : controller_(NULL),
                                   local_state_(NULL) {
   }
 
   ~WallpaperManagerBrowserTest() override {}
 
   void SetUpOnMainThread() override {
-    controller_ = ash::Shell::GetInstance()->wallpaper_controller();
+    controller_ = ash::WmShell::Get()->wallpaper_controller();
     controller_->set_wallpaper_reload_delay_for_test(0);
     local_state_ = g_browser_process->local_state();
     UpdateDisplay("800x600");
   }
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(switches::kLoginManager);
     command_line->AppendSwitchASCII(switches::kLoginProfile, "user");
   }
 
@@ skipping 762 matching lines @@
 
   WallpaperManager::Get()->SetDefaultWallpaperNow(EmptyAccountId());
   wallpaper_manager_test_utils::WaitAsyncWallpaperLoadFinished();
 
   EXPECT_TRUE(wallpaper_manager_test_utils::ImageIsNearColor(
       controller_->GetWallpaper(),
       wallpaper_manager_test_utils::kSmallDefaultWallpaperColor));
 }
 
 }  // namespace chromeos