Use NullAudioSink in WebMediaPlayerImpl if the audio sink is not OK.

media/blink/webmediaplayer_impl.cc

 // Copyright 2013 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 "media/blink/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <string>
@@ skipping 232 matching lines @@
 
   media_log_->AddEvent(
       media_log_->CreateEvent(MediaLogEvent::WEBMEDIAPLAYER_CREATED));
 
   if (params.initial_cdm())
     SetCdm(params.initial_cdm());
 
   // TODO(xhwang): When we use an external Renderer, many methods won't work,
   // e.g. GetCurrentFrameFromCompositor(). See http://crbug.com/434861
 
-  // Use the null sink if no sink was provided.
+  // Use the null sink if no valid sink was provided.
   audio_source_provider_ = new WebAudioSourceProviderImpl(
-      params.audio_renderer_sink().get()
+      params.audio_renderer_sink().get() &&
+              params.audio_renderer_sink()
+                      ->GetOutputDeviceInfo()
+                      .device_status() == OUTPUT_DEVICE_STATUS_OK
           ? params.audio_renderer_sink()
           : new NullAudioSink(media_task_runner_));
 }
 
 WebMediaPlayerImpl::~WebMediaPlayerImpl() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   suppress_destruction_errors_ = true;
   if (delegate_) {
     delegate_->PlayerGone(delegate_id_);
@@ skipping 1570 matching lines @@
       pipeline_metadata_.natural_size,
       base::Bind(&GetCurrentTimeInternal, this)));
   watch_time_reporter_->OnVolumeChange(volume_);
   if (delegate_ && delegate_->IsHidden())
     watch_time_reporter_->OnHidden();
   else
     watch_time_reporter_->OnShown();
 }
 
 }  // namespace media