ui: Cleanup class/struct forward declarations

content/renderer/media/android/renderer_media_player_manager.cc

Index: content/renderer/media/android/renderer_media_player_manager.cc
diff --git a/content/renderer/media/android/renderer_media_player_manager.cc b/content/renderer/media/android/renderer_media_player_manager.cc
index a93bbc4f937b6993758273e42df67cf0a449cfde..27ebfd7f54e53fefbefe754ecc7f4d29226494eb 100644
--- a/content/renderer/media/android/renderer_media_player_manager.cc
+++ b/content/renderer/media/android/renderer_media_player_manager.cc
@@ -49,6 +49,8 @@ bool RendererMediaPlayerManager::OnMessageReceived(const IPC::Message& msg) {
                         OnDisconnectedFromRemoteDevice)
     IPC_MESSAGE_HANDLER(MediaPlayerMsg_CancelledRemotePlaybackRequest,
                         OnCancelledRemotePlaybackRequest)
+    IPC_MESSAGE_HANDLER(MediaPlayerMsg_RemotePlaybackStarted,
+                        OnRemotePlaybackStarted)
     IPC_MESSAGE_HANDLER(MediaPlayerMsg_DidExitFullscreen, OnDidExitFullscreen)
     IPC_MESSAGE_HANDLER(MediaPlayerMsg_DidMediaPlayerPlay, OnPlayerPlay)
     IPC_MESSAGE_HANDLER(MediaPlayerMsg_DidMediaPlayerPause, OnPlayerPause)
@@ -215,6 +217,13 @@ void RendererMediaPlayerManager::OnCancelledRemotePlaybackRequest(
     player->OnCancelledRemotePlaybackRequest();
 }
 
+void RendererMediaPlayerManager::OnRemotePlaybackStarted(
+    int player_id) {
+  media::RendererMediaPlayerInterface* player = GetMediaPlayer(player_id);
+  if (player)
+    player->OnRemotePlaybackStarted();
+}
+
 void RendererMediaPlayerManager::OnDidExitFullscreen(int player_id) {
   media::RendererMediaPlayerInterface* player = GetMediaPlayer(player_id);
   if (player)