Revert of Remove |remote| and |readonly| members of MediaStreamTrack.

content/renderer/media/webmediaplayer_ms_compositor.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/webmediaplayer_ms_compositor.h"
 
 #include <stdint.h>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 127 matching lines @@
       total_frame_count_(0),
       dropped_frame_count_(0),
       stopped_(true) {
   main_message_loop_ = base::MessageLoop::current();
   io_thread_checker_.DetachFromThread();
 
   blink::WebVector<blink::WebMediaStreamTrack> video_tracks;
   if (!web_stream.isNull())
     web_stream.videoTracks(video_tracks);
 
-  if (video_tracks.size() > 0 &&
-      !base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kDisableRTCSmoothnessAlgorithm)) {
+  const bool remote_video =
+      video_tracks.size() && video_tracks[0].source().remote();
+
+  if (remote_video && !base::CommandLine::ForCurrentProcess()->HasSwitch(
+                          switches::kDisableRTCSmoothnessAlgorithm)) {
     base::AutoLock auto_lock(current_frame_lock_);
     rendering_frame_buffer_.reset(new media::VideoRendererAlgorithm(
         base::Bind(&WebMediaPlayerMSCompositor::MapTimestampsToRenderTimeTicks,
                    base::Unretained(this))));
   }
 
   // Just for logging purpose.
   std::string stream_id =
       web_stream.isNull() ? std::string() : web_stream.id().utf8();
-  serial_ = base::Hash(stream_id);;
+  const uint32_t hash_value = base::Hash(stream_id);
+  serial_ = (hash_value << 1) | (remote_video ? 1 : 0);
 }
 
 WebMediaPlayerMSCompositor::~WebMediaPlayerMSCompositor() {
   DCHECK(!video_frame_provider_client_)
       << "Must call StopUsingProvider() before dtor!";
 }
 
 gfx::Size WebMediaPlayerMSCompositor::GetCurrentSize() {
   DCHECK(thread_checker_.CalledOnValidThread());
   base::AutoLock auto_lock(current_frame_lock_);
@@ skipping 282 matching lines @@
   }
 
   if (!rendering_frame_buffer_) {
     rendering_frame_buffer_.reset(new media::VideoRendererAlgorithm(
         base::Bind(&WebMediaPlayerMSCompositor::MapTimestampsToRenderTimeTicks,
                    base::Unretained(this))));
   }
 }
 
 }  // namespace content