Forward the number of skipped frames by the OS in audio playout.

media/audio/audio_output_controller.cc

Index: media/audio/audio_output_controller.cc
diff --git a/media/audio/audio_output_controller.cc b/media/audio/audio_output_controller.cc
index 8aa2b4f38acfdfa989986ab5f4b035c3f1627bc9..6b59434e42e8eb03e861d7fcb38eb757f28767fa 100644
--- a/media/audio/audio_output_controller.cc
+++ b/media/audio/audio_output_controller.cc
@@ -160,7 +160,7 @@ void AudioOutputController::DoPlay() {
     return;
 
   // Ask for first packet.
-  sync_reader_->UpdatePendingBytes(0);
+  sync_reader_->UpdatePendingBytes(0, 0);
 
   state_ = kPlaying;
 
@@ -213,7 +213,7 @@ void AudioOutputController::DoPause() {
   // Let the renderer know we've stopped.  Necessary to let PPAPI clients know
   // audio has been shutdown.  TODO(dalecurtis): This stinks.  PPAPI should have
   // a better way to know when it should exit PPB_Audio_Shared::Run().
-  sync_reader_->UpdatePendingBytes(kuint32max);
+  sync_reader_->UpdatePendingBytes(kuint32max, 0);
 
   handler_->OnPaused();
 }
@@ -280,7 +280,8 @@ void AudioOutputController::DoReportError() {
 }
 
 int AudioOutputController::OnMoreData(AudioBus* dest,
-                                      uint32 total_bytes_delay) {
+                                      uint32_t total_bytes_delay,
+                                      uint32_t frames_skipped) {
   TRACE_EVENT0("audio", "AudioOutputController::OnMoreData");
 
   // Indicate that we haven't wedged (at least not indefinitely, WedgeCheck()
@@ -293,8 +294,8 @@ int AudioOutputController::OnMoreData(AudioBus* dest,
   sync_reader_->Read(dest);
 
   const int frames = dest->frames();
-  sync_reader_->UpdatePendingBytes(base::saturated_cast<uint32>(
-      total_bytes_delay + frames * params_.GetBytesPerFrame()));
+  sync_reader_->UpdatePendingBytes(
+      total_bytes_delay + frames * params_.GetBytesPerFrame(), frames_skipped);
 
   if (will_monitor_audio_levels())
     power_monitor_.Scan(*dest, frames);