Privitize WaitTillDataReady() and DataReady().

media/audio/virtual_audio_output_stream.cc

Index: media/audio/virtual_audio_output_stream.cc
diff --git a/media/audio/virtual_audio_output_stream.cc b/media/audio/virtual_audio_output_stream.cc
index 005fbc2ad644bace89470fda50a8e6d70111b29c..254a70a517a4d3a9e398bf3c03059b61a7674798 100644
--- a/media/audio/virtual_audio_output_stream.cc
+++ b/media/audio/virtual_audio_output_stream.cc
@@ -74,10 +74,6 @@ double VirtualAudioOutputStream::ProvideInput(AudioBus* audio_bus,
   DCHECK(message_loop_->BelongsToCurrentThread());
   DCHECK(callback_);
 
-  // A VirtualAudioInputStream with a larger buffer size may be calling this
-  // multiple times without waiting, so we need to block and ensure the data is
-  // ready to prevent glitching.
-  callback_->WaitTillDataReady();
   const int frames = callback_->OnMoreData(audio_bus, AudioBuffersState());
   if (frames < audio_bus->frames())
     audio_bus->ZeroFramesPartial(frames, audio_bus->frames() - frames);