Reload wallpaper when display configuration changes.

ash/test/test_shell_delegate.cc

 // 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.
 
 #include "ash/test/test_shell_delegate.h"
 
 #include <limits>
 
 #include "ash/caps_lock_delegate_stub.h"
 #include "ash/host/root_window_host_factory.h"
 #include "ash/keyboard_controller_proxy_stub.h"
 #include "ash/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/test_launcher_delegate.h"
 #include "ash/test/test_session_state_delegate.h"
 #include "ash/test/test_system_tray_delegate.h"
+#include "ash/test/test_user_wallpaper_delegate.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "base/logging.h"
 #include "content/public/test/test_browser_context.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/compositor.h"
 
 namespace ash {
 namespace test {
 
@@ skipping 128 matching lines @@
 LauncherDelegate* TestShellDelegate::CreateLauncherDelegate(
     ash::LauncherModel* model) {
   return new TestLauncherDelegate(model);
 }
 
 SystemTrayDelegate* TestShellDelegate::CreateSystemTrayDelegate() {
   return new TestSystemTrayDelegate;
 }
 
 UserWallpaperDelegate* TestShellDelegate::CreateUserWallpaperDelegate() {
-  return NULL;
+  return new TestUserWallpaperDelegate();
 }
 
 CapsLockDelegate* TestShellDelegate::CreateCapsLockDelegate() {
   return new CapsLockDelegateStub;
 }
 
 SessionStateDelegate* TestShellDelegate::CreateSessionStateDelegate() {
   DCHECK(!test_session_state_delegate_);
   test_session_state_delegate_ = new TestSessionStateDelegate();
   return test_session_state_delegate_;
@@ skipping 40 matching lines @@
 base::string16 TestShellDelegate::GetProductName() const {
   return base::string16();
 }
 
 TestSessionStateDelegate* TestShellDelegate::test_session_state_delegate() {
   return test_session_state_delegate_;
 }
 
 }  // namespace test
 }  // namespace ash