Pass the elapsed time from VoE to WebRtcAudioRenderer as the current time for the audio/video eleme…

content/renderer/media/webrtc_audio_renderer.cc

 // Copyright (c) 2012 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_audio_renderer.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 399 matching lines @@
   base::AutoLock auto_lock(lock_);
   if (state_ == UNINITIALIZED)
     return;
 
   DCHECK_EQ(state_, PLAYING);
   DCHECK_GT(play_ref_count_, 0);
   if (!--play_ref_count_)
     state_ = PAUSED;
 }
 
+void WebRtcAudioRenderer::SetCurrentRenderTime(
+    const base::TimeDelta& current_time) {
+  DCHECK(thread_checker_.CalledOnValidThread());

[no longer working on chromium, 2014/06/10 16:21:39]

it will hit the dcheck here.

[Ronghua Wu (Left Chromium), 2014/06/10 17:01:07]

Done.

+  current_time_ = current_time;
+}
+
 void WebRtcAudioRenderer::Stop() {
   DVLOG(1) << "WebRtcAudioRenderer::Stop()";
   DCHECK(thread_checker_.CalledOnValidThread());
   {
     base::AutoLock auto_lock(lock_);
     if (state_ == UNINITIALIZED)
       return;
 
     if (--start_ref_count_)
       return;
@@ skipping 13 matching lines @@
 
 void WebRtcAudioRenderer::SetVolume(float volume) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(volume >= 0.0f && volume <= 1.0f);
 
   playing_state_.set_volume(volume);
   OnPlayStateChanged(media_stream_, &playing_state_);
 }
 
 base::TimeDelta WebRtcAudioRenderer::GetCurrentRenderTime() const {
-  return base::TimeDelta();
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return current_time_;
 }
 
 bool WebRtcAudioRenderer::IsLocalRenderer() const {
   return false;
 }
 
 int WebRtcAudioRenderer::Render(media::AudioBus* audio_bus,
                                 int audio_delay_milliseconds) {
   base::AutoLock auto_lock(lock_);
   if (!source_)
@@ skipping 117 matching lines @@
       if (RemovePlayingState(source, state))
         EnterPauseState();
     } else if (AddPlayingState(source, state)) {
       EnterPlayState();
     }
     UpdateSourceVolume(source);
   }
 }
 
 }  // namespace content