[Refactor] Introduce MediaDelegate

chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc

 // 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.
 
 #include "chrome/browser/ui/ash/chrome_shell_delegate.h"
 
 #include "ash/accessibility_delegate.h"
+#include "ash/media_delegate.h"
 #include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/window_util.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
 #include "chrome/browser/chromeos/accessibility/magnification_manager.h"
 #include "chrome/browser/chromeos/background/ash_user_wallpaper_delegate.h"
 #include "chrome/browser/chromeos/display/display_preferences.h"
 #include "chrome/browser/chromeos/extensions/media_player_api.h"
@@ skipping 120 matching lines @@
       return chromeos::MagnificationManager::Get()->
           GetSavedScreenMagnifierScale();
     }
     return std::numeric_limits<double>::min();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AccessibilityDelegateImpl);
 };
 
+class MediaDelegateImpl : public ash::MediaDelegate {
+ public:
+  MediaDelegateImpl() {}
+  virtual ~MediaDelegateImpl() {}
+
+  virtual void HandleMediaNextTrack() OVERRIDE {
+    extensions::MediaPlayerAPI::Get(
+        ProfileManager::GetDefaultProfileOrOffTheRecord())->
+            media_player_event_router()->NotifyNextTrack();
+  }
+
+  virtual void HandleMediaPlayPause() OVERRIDE {
+    extensions::MediaPlayerAPI::Get(
+        ProfileManager::GetDefaultProfileOrOffTheRecord())->
+            media_player_event_router()->NotifyTogglePlayState();
+  }
+
+  virtual void HandleMediaPrevTrack() OVERRIDE {
+    extensions::MediaPlayerAPI::Get(
+        ProfileManager::GetDefaultProfileOrOffTheRecord())->
+            media_player_event_router()->NotifyPrevTrack();
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MediaDelegateImpl);
+};
+
 }  // anonymous namespace
 
 bool ChromeShellDelegate::IsFirstRunAfterBoot() const {
   return CommandLine::ForCurrentProcess()->HasSwitch(
       chromeos::switches::kFirstExecAfterBoot);
 }
 
 void ChromeShellDelegate::PreInit() {
   chromeos::LoadDisplayPreferences(IsFirstRunAfterBoot());
 }
@@ skipping 15 matching lines @@
 }
 
 ash::AccessibilityDelegate* ChromeShellDelegate::CreateAccessibilityDelegate() {
   return new AccessibilityDelegateImpl;
 }
 
 ash::NewWindowDelegate* ChromeShellDelegate::CreateNewWindowDelegate() {
   return new ChromeNewWindowDelegateChromeos;
 }
 
+ash::MediaDelegate* ChromeShellDelegate::CreateMediaDelegate() {
+  return new MediaDelegateImpl;
+}
+
 ash::SystemTrayDelegate* ChromeShellDelegate::CreateSystemTrayDelegate() {
   return chromeos::CreateSystemTrayDelegate();
 }
 
 ash::UserWallpaperDelegate* ChromeShellDelegate::CreateUserWallpaperDelegate() {
   return chromeos::CreateUserWallpaperDelegate();
 }
 
-void ChromeShellDelegate::HandleMediaNextTrack() {
-  extensions::MediaPlayerAPI::Get(
-      ProfileManager::GetDefaultProfileOrOffTheRecord())->
-          media_player_event_router()->NotifyNextTrack();
-}
-
-void ChromeShellDelegate::HandleMediaPlayPause() {
-  extensions::MediaPlayerAPI::Get(
-      ProfileManager::GetDefaultProfileOrOffTheRecord())->
-          media_player_event_router()->NotifyTogglePlayState();
-}
-
-void ChromeShellDelegate::HandleMediaPrevTrack() {
-  extensions::MediaPlayerAPI::Get(
-      ProfileManager::GetDefaultProfileOrOffTheRecord())->
-          media_player_event_router()->NotifyPrevTrack();
-}
-
 void ChromeShellDelegate::Observe(int type,
                                   const content::NotificationSource& source,
                                   const content::NotificationDetails& details) {
   switch (type) {
     case chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED:
       ash::Shell::GetInstance()->CreateLauncher();
       break;
     case chrome::NOTIFICATION_SESSION_STARTED:
       RestoreFocus();
       ash::Shell::GetInstance()->ShowLauncher();
       break;
     default:
       NOTREACHED() << "Unexpected notification " << type;
   }
 }
 
 void ChromeShellDelegate::PlatformInit() {
   registrar_.Add(this,
                  chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED,
                  content::NotificationService::AllSources());
   registrar_.Add(this,
                  chrome::NOTIFICATION_SESSION_STARTED,
                  content::NotificationService::AllSources());
 }