Fixing HtmlAudioElementCapturerSource::OnAudioBus() to accept delay frames intead of milliseconds.

content/renderer/media/html_audio_element_capturer_source.cc

 // Copyright 2016 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/html_audio_element_capturer_source.h"
 
 #include "base/threading/thread_task_runner_handle.h"
 #include "media/base/audio_parameters.h"
 #include "media/base/audio_renderer_sink.h"
 #include "media/blink/webaudiosourceprovider_impl.h"
@@ skipping 47 matching lines @@
 
   if (audio_source_) {
     audio_source_->ClearCopyAudioCallback();
     audio_source_ = nullptr;
   }
   is_started_ = false;
 }
 
 void HtmlAudioElementCapturerSource::OnAudioBus(
     std::unique_ptr<media::AudioBus> audio_bus,
-    uint32_t delay_milliseconds,
+    uint32_t frames_delayed,
     int sample_rate) {
   const base::TimeTicks capture_time =
       base::TimeTicks::Now() -
-      base::TimeDelta::FromMilliseconds(delay_milliseconds);
+      base::TimeDelta::FromMicroseconds(base::Time::kMicrosecondsPerSecond *
+                                        frames_delayed / sample_rate);
 
   if (sample_rate != last_sample_rate_ ||
       audio_bus->channels() != last_num_channels_ ||
       audio_bus->frames() != last_bus_frames_) {
     MediaStreamAudioSource::SetFormat(
         media::AudioParameters(media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
                                media::GuessChannelLayout(audio_bus->channels()),
                                sample_rate, 16, audio_bus->frames()));
     last_sample_rate_ = sample_rate;
     last_num_channels_ = audio_bus->channels();
     last_bus_frames_ = audio_bus->frames();
   }
 
   MediaStreamAudioSource::DeliverDataToTracks(*audio_bus, capture_time);
 }
 
 }  // namespace content