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

ash/test/ash_test_helper.h

 // Copyright 2013 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_HELPER_H_
 #define ASH_TEST_ASH_TEST_HELPER_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 
@@ skipping 43 matching lines @@
 
   base::MessageLoopForUI* message_loop() { return message_loop_; }
   TestShellDelegate* test_shell_delegate() { return test_shell_delegate_; }
   void set_test_shell_delegate(TestShellDelegate* test_shell_delegate) {
     test_shell_delegate_ = test_shell_delegate;
   }
   TestScreenshotDelegate* test_screenshot_delegate() {
     return test_screenshot_delegate_;
   }
 
+  // True if the running environment supports multiple displays,
+  // or false otherwise (e.g. win8 bot).
+  static bool SupportsMultipleDisplays();
+
+  // True if the running environment supports host window resize,
+  // or false otherwise (e.g. win8 bot).
+  static bool SupportsHostWindowResize();
+
  private:
   base::MessageLoopForUI* message_loop_;  // Not owned.
   TestShellDelegate* test_shell_delegate_;  // Owned by ash::Shell.
   scoped_ptr<ui::ScopedAnimationDurationScaleMode> zero_duration_mode_;
 
   // Owned by ash::AcceleratorController
   TestScreenshotDelegate* test_screenshot_delegate_;
 
   scoped_ptr<wm::WMState> wm_state_;
 
   // Check if DBus Thread Manager was initialized here.
   bool dbus_thread_manager_initialized_;
 
   DISALLOW_COPY_AND_ASSIGN(AshTestHelper);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_ASH_TEST_HELPER_H_