Ash: Support "Next Song", "Previous Song", "Play/Pause" Multi Media buttons

chrome/browser/ui/ash/chrome_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 "chrome/browser/ui/ash/chrome_shell_delegate.h"
 
 #include "ash/launcher/launcher_types.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/wm/window_util.h"
 #include "base/command_line.h"
@@ skipping 21 matching lines @@
 #include "grit/generated_resources.h"
 #include "ui/aura/client/user_action_client.h"
 #include "ui/aura/window.h"
 
 #if defined(OS_CHROMEOS)
 #include "ash/keyboard_overlay/keyboard_overlay_view.h"
 #include "base/chromeos/chromeos_version.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_util.h"
 #include "chrome/browser/chromeos/background/ash_user_wallpaper_delegate.h"
 #include "chrome/browser/chromeos/extensions/file_manager_util.h"
+#include "chrome/browser/chromeos/extensions/media_player_event_router.h"
 #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/login/webui_login_display_host.h"
 #include "chrome/browser/chromeos/system/ash_system_tray_delegate.h"
 #include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
 #include "chrome/browser/ui/webui/chromeos/mobile_setup_dialog.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/power_manager_client.h"
 #include "chromeos/dbus/session_manager_client.h"
 #endif
@@ skipping 304 matching lines @@
     case ash::UMA_LAUNCHER_CLICK_ON_APPLIST_BUTTON:
       content::RecordAction(
           content::UserMetricsAction("Launcher_ClickOnApplistButton"));
       break;
     case ash::UMA_LAUNCHER_CLICK_ON_APP:
       content::RecordAction(content::UserMetricsAction("Launcher_ClickOnApp"));
       break;
   }
 }
 
+void ChromeShellDelegate::HandleMediaNextTrack() {
+#if defined(OS_CHROMEOS)
+  ExtensionMediaPlayerEventRouter::GetInstance()->NotifyNextTrack();
+#endif
+}
+
+void ChromeShellDelegate::HandleMediaPlayPause() {
+#if defined(OS_CHROMEOS)
+  ExtensionMediaPlayerEventRouter::GetInstance()->NotifyTogglePlayState();
+#endif
+}
+
+void ChromeShellDelegate::HandleMediaPrevTrack() {
+#if defined(OS_CHROMEOS)
+  ExtensionMediaPlayerEventRouter::GetInstance()->NotifyPrevTrack();
+#endif
+}
+
 void ChromeShellDelegate::Observe(int type,
                                   const content::NotificationSource& source,
                                   const content::NotificationDetails& details) {
 #if defined(OS_CHROMEOS)
   switch (type) {
     case chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED:
       ash::Shell::GetInstance()->CreateLauncher();
       break;
     case chrome::NOTIFICATION_SESSION_STARTED:
       ash::Shell::GetInstance()->ShowLauncher();
       break;
     default:
       NOTREACHED() << "Unexpected notification " << type;
   }
 #else
   // MSVC++ warns about switch statements without any cases.
   NOTREACHED() << "Unexpected notification " << type;
 #endif
 }