work-in-progress patch to fix context lost black video

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 6b3a5895c6c99b6fb2a7b5112319e757f3089363..c70a9fcb11264f184167a3104a7ab9a9ef5681e1 100644
--- a/content/renderer/media/android/webmediaplayer_android.cc
+++ b/content/renderer/media/android/webmediaplayer_android.cc
@@ -153,6 +153,7 @@ WebMediaPlayerAndroid::WebMediaPlayerAndroid(
   DCHECK(cdm_manager_);
 
   DCHECK(main_thread_checker_.CalledOnValidThread());
+  stream_texture_factory_->AddObserver(this);
 
   player_id_ = player_manager_->RegisterMediaPlayer(this);
 
@@ -194,6 +195,8 @@ WebMediaPlayerAndroid::~WebMediaPlayerAndroid() {
 
   if (player_type_ == MEDIA_PLAYER_TYPE_MEDIA_SOURCE && delegate_)
     delegate_->PlayerGone(this);
+
+  stream_texture_factory_->RemoveObserver(this);
 }
 
 void WebMediaPlayerAndroid::load(LoadType load_type,
@@ -322,6 +325,28 @@ void WebMediaPlayerAndroid::play() {
   UpdateNetworkState(WebMediaPlayer::NetworkStateLoading);
 }
 
+void WebMediaPlayerAndroid::ResetStreamTextureProxy() {
+  if (stream_id_) {
+    GLES2Interface* gl = stream_texture_factory_->ContextGL();
+    gl->DeleteTextures(1, &texture_id_);
+    texture_id_ = 0;
+    texture_mailbox_ = gpu::Mailbox();
+    stream_id_ = 0;
+  }
+  stream_texture_proxy_.reset();
+  SetNeedsEstablishPeer(true);
+
+  TryCreateStreamTextureProxyIfNeeded();
+  // TODO(boliu): This is not thread safe.
+  stream_texture_proxy_initialized_ = false;
+  if (hasVideo() && needs_establish_peer_ &&

[qinmin, 2014/09/04 00:14:47]

isn't needs_establish_peer_ true since you called SetNeedsEstablishPeer(true)
above?

+      !player_manager_->IsInFullscreen(frame_)) {
+    EstablishSurfaceTexturePeer();
+  }
+
+  // TODO(boliu): Inform |video_frame_provider_client_| on compositor thread.

[qinmin, 2014/09/04 00:14:47]

you also need to bind the new stream texture proxy to the compositor thread

+}
+
 void WebMediaPlayerAndroid::pause() {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   Pause(true);