[Blink,RemotePlayback] Use PresentationController for availability

third_party/WebKit/Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights
  * reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1114 matching lines @@
   // The resource fetch algorithm
   SetNetworkState(kNetworkLoading);
 
   // Set current_src_ *before* changing to the cache url, the fact that we are
   // loading from the app cache is an internal detail not exposed through the
   // media element API.
   current_src_ = url;
 
   if (audio_source_node_)
     audio_source_node_->OnCurrentSrcChanged(current_src_);
+  if (RuntimeEnabledFeatures::newRemotePlaybackPipelineEnabled() &&
+      RemotePlaybackClient()) {
+    RemotePlaybackClient()->SourceChanged(current_src_);

[mark a. foltz, 2017/05/31 21:16:41]

Is the goal to track the currently playing source or to track all sources listed
in the media element?

+  }
 
   BLINK_MEDIA_LOG << "loadResource(" << (void*)this << ") - current_src_ -> "
                   << UrlForLoggingMedia(current_src_);
 
   StartProgressEventTimer();
 
   // Reset display mode to force a recalculation of what to show because we are
   // resetting the player.
   SetDisplayMode(kUnknown);
 
@@ skipping 1994 matching lines @@
     PlayInternal();
 }
 
 void HTMLMediaElement::RequestSeek(double time) {
   // The player is the source of this seek request.
   setCurrentTime(time);
 }
 
 void HTMLMediaElement::RemoteRouteAvailabilityChanged(
     WebRemotePlaybackAvailability availability) {
-  if (RemotePlaybackClient())
+  if (RemotePlaybackClient() &&
+      !RuntimeEnabledFeatures::newRemotePlaybackPipelineEnabled()) {
     RemotePlaybackClient()->AvailabilityChanged(availability);
+  }
 }
 
 bool HTMLMediaElement::HasRemoteRoutes() const {
   // TODO(mlamouri): used by MediaControlsPainter; should be refactored out.
   return RemotePlaybackClient() &&
          RemotePlaybackClient()->RemotePlaybackAvailable();
 }
 
 void HTMLMediaElement::ConnectedToRemoteDevice() {
   playing_remotely_ = true;
@@ skipping 915 matching lines @@
       kMostlyFillViewportBecomeStableSeconds, BLINK_FROM_HERE);
 }
 
 void HTMLMediaElement::ViewportFillDebouncerTimerFired(TimerBase*) {
   mostly_filling_viewport_ = true;
   if (web_media_player_)
     web_media_player_->BecameDominantVisibleContent(mostly_filling_viewport_);
 }
 
 }  // namespace blink