mash: Migrate wallpaper controllers to ash/common.

chrome/browser/chromeos/customization/customization_wallpaper_downloader_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 <stddef.h>
 
 #include <vector>
 
-#include "ash/shell.h"
-#include "ash/wallpaper/wallpaper_controller.h"
+#include "ash/common/wallpaper/wallpaper_controller.h"
+#include "ash/common/wm_shell.h"
 #include "base/command_line.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/time/time.h"
 #include "chrome/browser/chromeos/customization/customization_document.h"
 #include "chrome/browser/chromeos/customization/customization_wallpaper_downloader.h"
 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_test_utils.h"
 #include "chrome/test/base/in_process_browser_test.h"
@@ skipping 200 matching lines @@
     : public InProcessBrowserTest {
  public:
   CustomizationWallpaperDownloaderBrowserTest()
       : controller_(NULL),
         local_state_(NULL) {
   }
 
   ~CustomizationWallpaperDownloaderBrowserTest() override {}
 
   void SetUpOnMainThread() override {
-    controller_ = ash::Shell::GetInstance()->wallpaper_controller();
+    controller_ = ash::WmShell::Get()->wallpaper_controller();
     local_state_ = g_browser_process->local_state();
   }
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(chromeos::switches::kLoginManager);
     command_line->AppendSwitchASCII(chromeos::switches::kLoginProfile, "user");
   }
 
   void TearDownOnMainThread() override { controller_ = NULL; }
 
@@ skipping 70 matching lines @@
 
   observer.WaitForWallpaperAnimationFinished();
   EXPECT_TRUE(wallpaper_manager_test_utils::ImageIsNearColor(
       controller_->GetWallpaper(),
       wallpaper_manager_test_utils::kCustomWallpaperColor));
 
   EXPECT_EQ(2U, url_factory.num_attempts());
 }
 
 }  // namespace chromeos