Pretend the video has no audio track if it is playing as part of autoplay muted.

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 518 matching lines @@
   }
 }
 
 void WebMediaPlayerImpl::setVolume(double volume) {
   DVLOG(1) << __func__ << "(" << volume << ")";
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   volume_ = volume;
   pipeline_.SetVolume(volume_ * volume_multiplier_);
   if (watch_time_reporter_)
     watch_time_reporter_->OnVolumeChange(volume);
+
+  // The play state is updated because the player might have left the autoplay
+  // muted state.
+  UpdatePlayState();
 }
 
 void WebMediaPlayerImpl::setSinkId(
     const blink::WebString& sink_id,
     const blink::WebSecurityOrigin& security_origin,
     blink::WebSetSinkIdCallbacks* web_callback) {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   DVLOG(1) << __func__;
 
   media::OutputDeviceStatusCB callback =
@@ skipping 1028 matching lines @@
   bool is_backgrounded =
       IsBackgroundedSuspendEnabled() && delegate_ && delegate_->IsHidden();
   PlayState state = UpdatePlayState_ComputePlayState(is_remote, is_suspended,
                                                      is_backgrounded);
   SetDelegateState(state.delegate_state);
   SetMemoryReportingState(state.is_memory_reporting_enabled);
   SetSuspendState(state.is_suspended || pending_suspend_resume_cycle_);
 }
 
 void WebMediaPlayerImpl::SetDelegateState(DelegateState new_state) {
-  if (!delegate_ || delegate_state_ == new_state)
+  if (!delegate_)
     return;
 
+  if (delegate_state_ == new_state) {
+    if (delegate_state_ != DelegateState::PLAYING ||
+        autoplay_muted_ == client_->isAutoplayingMuted()) {
+      return;
+    }
+  }
+
   delegate_state_ = new_state;
 
   switch (delegate_state_) {
     case DelegateState::GONE:
       delegate_->PlayerGone(delegate_id_);
       break;
-    case DelegateState::PLAYING:
+    case DelegateState::PLAYING: {
+      autoplay_muted_ = client_->isAutoplayingMuted();
+      bool has_audio = autoplay_muted_ ? false : hasAudio();
       delegate_->DidPlay(
-          delegate_id_, hasVideo(), hasAudio(), false,
+          delegate_id_, hasVideo(), has_audio, false,
           media::DurationToMediaContentType(pipeline_.GetMediaDuration()));
       break;
+    }
     case DelegateState::PAUSED:
       delegate_->DidPause(delegate_id_, false);
       break;
     case DelegateState::ENDED:
       delegate_->DidPause(delegate_id_, true);
       break;
   }
 }
 
 void WebMediaPlayerImpl::SetMemoryReportingState(
@@ skipping 204 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