Move all wallpaper file loading and decoding from DesktopBackgroundController to WallpaperManager.

ash/test/ash_test_base.h

 // 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.
 
 #ifndef ASH_TEST_ASH_TEST_BASE_H_
 #define ASH_TEST_ASH_TEST_BASE_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 84 matching lines @@
 
  protected:
   enum UserSessionBlockReason {
     FIRST_BLOCK_REASON,
     BLOCKED_BY_LOCK_SCREEN = FIRST_BLOCK_REASON,
     BLOCKED_BY_LOGIN_SCREEN,
     BLOCKED_BY_USER_ADDING_SCREEN,
     NUMBER_OF_BLOCK_REASONS
   };
 
-  // True if the running environment supports multiple displays,
-  // or false otherwise (e.g. win8 bot).
+  // Proxy to AshTestHelper::SupportsMultipleDisplays().
   static bool SupportsMultipleDisplays();
 
-  // True if the running environment supports host window resize,
-  // or false otherwise (e.g. win8 bot).
+  // Proxy to AshTestHelper::SupportsHostWindowResize().
   static bool SupportsHostWindowResize();
 
   void set_start_session(bool start_session) { start_session_ = start_session; }
 
   AshTestHelper* ash_test_helper() { return ash_test_helper_.get(); }
 
   void RunAllPendingInMessageLoop();
 
   TestScreenshotDelegate* GetScreenshotDelegate();
   TestSystemTrayDelegate* GetSystemTrayDelegate();
@@ skipping 38 matching lines @@
   virtual ~NoSessionAshTestBase() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NoSessionAshTestBase);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_ASH_TEST_BASE_H_