[Refactor] Introduce MediaDelegate

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/default_accessibility_delegate.h"
 #include "ash/host/root_window_host_factory.h"
 #include "ash/keyboard_controller_proxy_stub.h"
+#include "ash/media_delegate.h"
 #include "ash/new_window_delegate.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"
@@ skipping 10 matching lines @@
   virtual void NewTab() OVERRIDE {}
   virtual void NewWindow(bool incognito) OVERRIDE {}
   virtual void OpenFileManager() OVERRIDE {}
   virtual void OpenCrosh() OVERRIDE {}
   virtual void RestoreTab() OVERRIDE {}
   virtual void ShowKeyboardOverlay() OVERRIDE {}
   virtual void ShowTaskManager() OVERRIDE {}
   virtual void OpenFeedbackPage() OVERRIDE {}
 };
 
+class MediaDelegateImpl : public MediaDelegate {
+ public:
+  virtual void HandleMediaNextTrack() OVERRIDE {}
+  virtual void HandleMediaPlayPause() OVERRIDE {}
+  virtual void HandleMediaPrevTrack() OVERRIDE {}
+};
+
 }  // namespace
 
 TestShellDelegate::TestShellDelegate()
     : num_exit_requests_(0),
       multi_profiles_enabled_(false),
       test_session_state_delegate_(NULL) {
 }
 
 TestShellDelegate::~TestShellDelegate() {
 }
@@ skipping 61 matching lines @@
 }
 
 AccessibilityDelegate* TestShellDelegate::CreateAccessibilityDelegate() {
   return new internal::DefaultAccessibilityDelegate();
 }
 
 NewWindowDelegate* TestShellDelegate::CreateNewWindowDelegate() {
   return new NewWindowDelegateImpl;
 }
 
+MediaDelegate* TestShellDelegate::CreateMediaDelegate() {
+  return new MediaDelegateImpl;
+}
+
 aura::client::UserActionClient* TestShellDelegate::CreateUserActionClient() {
   return NULL;
 }
 
 void TestShellDelegate::RecordUserMetricsAction(UserMetricsAction action) {
 }
 
-void TestShellDelegate::HandleMediaNextTrack() {
-}
-
-void TestShellDelegate::HandleMediaPlayPause() {
-}
-
-void TestShellDelegate::HandleMediaPrevTrack() {
-}
-
 ui::MenuModel* TestShellDelegate::CreateContextMenu(aura::Window* root) {
   return NULL;
 }
 
 RootWindowHostFactory* TestShellDelegate::CreateRootWindowHostFactory() {
   // The ContextFactory must exist before any Compositors are created.
   bool allow_test_contexts = true;
   ui::Compositor::InitializeContextFactoryForTests(allow_test_contexts);
 
   return RootWindowHostFactory::Create();
 }
 
 base::string16 TestShellDelegate::GetProductName() const {
   return base::string16();
 }
 
 TestSessionStateDelegate* TestShellDelegate::test_session_state_delegate() {
   return test_session_state_delegate_;
 }
 
 }  // namespace test
 }  // namespace ash