Implement media Cast button in Blink

content/renderer/media/android/webmediaplayer_android.cc

Index: content/renderer/media/android/webmediaplayer_android.cc
diff --git a/content/renderer/media/android/webmediaplayer_android.cc b/content/renderer/media/android/webmediaplayer_android.cc
index f5dd958ba5c10fd7a5cce1640997d7ee6dcfd3a0..d19dee8f13a6534fa12a8df5d835075297d099b5 100644
--- a/content/renderer/media/android/webmediaplayer_android.cc
+++ b/content/renderer/media/android/webmediaplayer_android.cc
@@ -295,6 +295,14 @@ void WebMediaPlayerAndroid::pause() {
   Pause(true);
 }
 
+void WebMediaPlayerAndroid::requestRemotePlayback() {
+  player_manager_->RequestRemotePlayback(player_id_);
+}
+
+void WebMediaPlayerAndroid::requestRemotePlaybackControl() {
+  player_manager_->RequestRemotePlaybackControl(player_id_);
+}
+
 void WebMediaPlayerAndroid::seek(double seconds) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   DVLOG(1) << __FUNCTION__ << "(" << seconds << ")";
@@ -811,6 +819,7 @@ void WebMediaPlayerAndroid::OnConnectedToRemoteDevice(
   DrawRemotePlaybackText(remote_playback_message);
   is_remote_ = true;
   SetNeedsEstablishPeer(false);
+  client_->connectedToRemoteDevice();
 }
 
 void WebMediaPlayerAndroid::OnDisconnectedFromRemoteDevice() {
@@ -821,6 +830,7 @@ void WebMediaPlayerAndroid::OnDisconnectedFromRemoteDevice() {
     EstablishSurfaceTexturePeer();
   is_remote_ = false;
   ReallocateVideoFrame();
+  client_->disconnectedFromRemoteDevice();
 }
 
 void WebMediaPlayerAndroid::OnDidEnterFullscreen() {
@@ -860,6 +870,11 @@ void WebMediaPlayerAndroid::OnRequestFullscreen() {
   client_->requestFullscreen();
 }
 
+void WebMediaPlayerAndroid::OnRemoteRouteAvailabilityChanged(
+    bool routes_available) {
+  client_->remoteRouteAvailabilityChanged(routes_available);
+}
+
 void WebMediaPlayerAndroid::OnDurationChanged(const base::TimeDelta& duration) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   // Only MSE |player_type_| registers this callback.