Implement MediaSession on top of the WebMediaPlayerDelegate.

media/blink/webmediaplayer_cast_android.cc

Index: media/blink/webmediaplayer_cast_android.cc
diff --git a/media/blink/webmediaplayer_cast_android.cc b/media/blink/webmediaplayer_cast_android.cc
index fc3de1cf4a06cdf704c9f428d6b36a2ef4cffd78..cefd208bc0063517f3fc8555611941058ef33f89 100644
--- a/media/blink/webmediaplayer_cast_android.cc
+++ b/media/blink/webmediaplayer_cast_android.cc
@@ -157,12 +157,8 @@ scoped_refptr<VideoFrame> MakeTextFrameForCast(
 WebMediaPlayerCast::WebMediaPlayerCast(
     WebMediaPlayerImpl* impl,
     blink::WebMediaPlayerClient* client,
-    const WebMediaPlayerParams::Context3DCB& context_3d_cb,
-    base::WeakPtr<WebMediaPlayerDelegate> delegate)
-    : webmediaplayer_(impl),
-      client_(client),
-      context_3d_cb_(context_3d_cb),
-      delegate_(delegate) {}
+    const WebMediaPlayerParams::Context3DCB& context_3d_cb)
+    : webmediaplayer_(impl), client_(client), context_3d_cb_(context_3d_cb) {}
 
 WebMediaPlayerCast::~WebMediaPlayerCast() {
   if (player_manager_) {
@@ -174,10 +170,11 @@ WebMediaPlayerCast::~WebMediaPlayerCast() {
 }
 
 void WebMediaPlayerCast::Initialize(const GURL& url,
-                                    blink::WebLocalFrame* frame) {
+                                    blink::WebLocalFrame* frame,
+                                    int delegate_id) {
   player_manager_->Initialize(MEDIA_PLAYER_TYPE_REMOTE_ONLY, player_id_, url,
                               frame->document().firstPartyForCookies(), 0,
-                              frame->document().url(), true);
+                              frame->document().url(), true, delegate_id);
   is_player_initialized_ = true;
 }
 
@@ -200,7 +197,9 @@ void WebMediaPlayerCast::requestRemotePlaybackControl() {
 void WebMediaPlayerCast::OnMediaMetadataChanged(base::TimeDelta duration,
                                                 int width,
                                                 int height,
-                                                bool success) {}
+                                                bool success) {
+  duration_ = duration;
+}
 
 void WebMediaPlayerCast::OnPlaybackComplete() {
   DVLOG(1) << __FUNCTION__;
@@ -249,8 +248,6 @@ void WebMediaPlayerCast::OnConnectedToRemoteDevice(
   is_remote_ = true;
   initializing_ = true;
   paused_ = false;
-  if (delegate_)
-    delegate_->DidPlay(webmediaplayer_);
   client_->playbackStateChanged();
 
   remote_playback_message_ = remote_playback_message;
@@ -273,8 +270,6 @@ void WebMediaPlayerCast::play() {
   player_manager_->Start(player_id_);
   remote_time_at_ = base::TimeTicks::Now();
   paused_ = false;
-  if (delegate_)
-    delegate_->DidPlay(webmediaplayer_);
 }
 
 void WebMediaPlayerCast::pause() {
@@ -290,8 +285,6 @@ void WebMediaPlayerCast::OnDisconnectedFromRemoteDevice() {
   DVLOG(1) << __FUNCTION__;
   if (!paused_) {
     paused_ = true;
-    if (delegate_)
-      delegate_->DidPause(webmediaplayer_);
   }
   is_remote_ = false;
   double t = currentTime();
@@ -310,8 +303,6 @@ void WebMediaPlayerCast::OnMediaPlayerPlay() {
   initializing_ = false;
   if (is_remote_ && paused_) {
     paused_ = false;
-    if (paused_)
-      delegate_->DidPlay(webmediaplayer_);
     remote_time_at_ = base::TimeTicks::Now();
     client_->playbackStateChanged();
   }
@@ -324,8 +315,6 @@ void WebMediaPlayerCast::OnMediaPlayerPause() {
   DVLOG(1) << __FUNCTION__ << " is_remote_ = " << is_remote_;
   if (is_remote_ && !paused_) {
     paused_ = true;
-    if (delegate_)
-      delegate_->DidPause(webmediaplayer_);
     client_->playbackStateChanged();
   }
 }