content::RTCRtpSenders/Receivers using track adapter references.

content/renderer/media/webrtc/rtc_rtp_receiver.cc

 // Copyright (c) 2017 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/webrtc/rtc_rtp_receiver.h"
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "content/renderer/media/webrtc/rtc_rtp_contributing_source.h"
 #include "third_party/webrtc/base/scoped_ref_ptr.h"
 
 namespace content {
 
-namespace {
-
-inline bool operator==(const blink::WebMediaStreamTrack& web_track,
-                       const webrtc::MediaStreamTrackInterface& webrtc_track) {
-  return !web_track.IsNull() && web_track.Id() == webrtc_track.id().c_str();
-}
-
-}  // namespace
-
 uintptr_t RTCRtpReceiver::getId(
     const webrtc::RtpReceiverInterface* webrtc_rtp_receiver) {
   return reinterpret_cast<uintptr_t>(webrtc_rtp_receiver);
 }
 
 RTCRtpReceiver::RTCRtpReceiver(
     webrtc::RtpReceiverInterface* webrtc_rtp_receiver,
-    const blink::WebMediaStreamTrack& web_track)
-    : webrtc_rtp_receiver_(webrtc_rtp_receiver), web_track_(web_track) {
+    std::unique_ptr<WebRtcMediaStreamTrackAdapterMap::AdapterRef> track_adapter)
+    : webrtc_rtp_receiver_(webrtc_rtp_receiver),
+      track_adapter_(std::move(track_adapter)) {
   DCHECK(webrtc_rtp_receiver_);
-  DCHECK(!web_track_.IsNull());
-  DCHECK(web_track_ == webrtc_track());
+  DCHECK(track_adapter_);
+  DCHECK(track_adapter_->webrtc_track() == webrtc_rtp_receiver_->track());
 }
 
 RTCRtpReceiver::~RTCRtpReceiver() {}
 
 uintptr_t RTCRtpReceiver::Id() const {
   return getId(webrtc_rtp_receiver_.get());
 }
 
 const blink::WebMediaStreamTrack& RTCRtpReceiver::Track() const {
-  DCHECK(web_track_ == webrtc_track());
-  return web_track_;
+  DCHECK(track_adapter_->webrtc_track() == webrtc_rtp_receiver_->track());
+  return track_adapter_->web_track();
 }
 
 blink::WebVector<std::unique_ptr<blink::WebRTCRtpContributingSource>>
 RTCRtpReceiver::GetSources() {
   auto webrtc_sources = webrtc_rtp_receiver_->GetSources();
   blink::WebVector<std::unique_ptr<blink::WebRTCRtpContributingSource>> sources(
       webrtc_sources.size());
   for (size_t i = 0; i < webrtc_sources.size(); ++i) {
     sources[i] = base::MakeUnique<RTCRtpContributingSource>(webrtc_sources[i]);
   }
   return sources;
 }
 
 const webrtc::MediaStreamTrackInterface& RTCRtpReceiver::webrtc_track() const {
-  const webrtc::MediaStreamTrackInterface* webrtc_track =
-      webrtc_rtp_receiver_->track();
-  DCHECK(webrtc_track);
-  DCHECK(web_track_ == *webrtc_track);
-  return *webrtc_track;
+  DCHECK(track_adapter_->webrtc_track() == webrtc_rtp_receiver_->track());
+  DCHECK(track_adapter_->webrtc_track());
+  return *track_adapter_->webrtc_track();
 }
 
 }  // namespace content