Make more media APIs aware of |delay| and |delay_timestamp|

content/browser/renderer_host/media/audio_sync_reader.cc

Index: content/browser/renderer_host/media/audio_sync_reader.cc
diff --git a/content/browser/renderer_host/media/audio_sync_reader.cc b/content/browser/renderer_host/media/audio_sync_reader.cc
index 6299aaf7e665b038956893ef87a562dac5a623af..a79da77eff251ef14910ef2e9bdd5789b519ebaf 100644
--- a/content/browser/renderer_host/media/audio_sync_reader.cc
+++ b/content/browser/renderer_host/media/audio_sync_reader.cc
@@ -18,10 +18,12 @@
 #include "build/build_config.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/public/common/content_switches.h"
+#include "media/audio/audio_device_thread.h"
 #include "media/base/audio_parameters.h"
 
 using media::AudioBus;
 using media::AudioOutputBuffer;
+using Packet = media::AudioDeviceThread::Packet;
 
 namespace {
 
@@ -140,8 +142,9 @@ std::unique_ptr<AudioSyncReader> AudioSyncReader::Create(
 }
 
 // media::AudioOutputController::SyncReader implementations.
-void AudioSyncReader::UpdatePendingBytes(uint32_t bytes,
-                                         uint32_t frames_skipped) {
+void AudioSyncReader::PrepareNextData(base::TimeDelta delay,
+                                      base::TimeTicks delay_timestamp,
+                                      uint32_t frames_skipped) {
   // Increase the number of skipped frames stored in shared memory. We don't
   // send it over the socket since sending more than 4 bytes might lead to being
   // descheduled. The reading side will zero it when consumed.
@@ -153,7 +156,8 @@ void AudioSyncReader::UpdatePendingBytes(uint32_t bytes,
   // in the anomalous case if the renderer is unable to keep up with real-time.
   output_bus_->Zero();
 
-  socket_->Send(&bytes, sizeof(bytes));
+  Packet packet = {delay.ToInternalValue(), delay_timestamp.ToInternalValue()};

[DaleCurtis, 2016/10/20 18:35:29]

In the past, there were concerns that sending more than 4 bytes of data might
cause descheduling of the real-time audio thread. Probably this needs to be
watched closely to see if we see an increase in AudioRendererMissedDeadline,
AudioRendererAudioGlitches, etc.

[miu, 2016/10/23 01:19:15]

ditto here: Please use InMicroseconds() instead of ToInternalValue().

[Mikhail, 2016/10/24 19:50:23]

Done.

+  socket_->Send(&packet, sizeof(packet));
   ++buffer_index_;
 }