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

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index a73b806da922b65ec416b27e3f872d313914ffe9..7684ebfbd9350b4bc3710a549ad61fc677914420 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -39,6 +39,7 @@
 #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"
@@ -363,6 +364,24 @@ void ChromeShellDelegate::RecordUserMetricsAction(
   }
 }
 
+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) {