Privitize WaitTillDataReady() and DataReady().

media/audio/win/waveout_output_win.cc

Index: media/audio/win/waveout_output_win.cc
diff --git a/media/audio/win/waveout_output_win.cc b/media/audio/win/waveout_output_win.cc
index 9b03c31cbd7cd93d7c6d6b6d5c344af5f44fb4cd..47d4fa65053a157a3466680b50ef4b81ca8991a5 100644
--- a/media/audio/win/waveout_output_win.cc
+++ b/media/audio/win/waveout_output_win.cc
@@ -204,10 +204,6 @@ void PCMWaveOutAudioOutputStream::Start(AudioSourceCallback* callback) {
   pending_bytes_ = 0;
   for (int ix = 0; ix != num_buffers_; ++ix) {
     WAVEHDR* buffer = GetBuffer(ix);
-    // Caller waits for 1st packet to become available, but not for others,
-    // so we wait for them here.
-    if (ix != 0)
-      callback_->WaitTillDataReady();
     QueueNextPacket(buffer);  // Read more data.
     pending_bytes_ += buffer->dwBufferLength;
   }
@@ -343,13 +339,6 @@ void PCMWaveOutAudioOutputStream::QueueNextPacket(WAVEHDR *buffer) {
   // return to us how many bytes were used.
   // TODO(fbarchard): Handle used 0 by queueing more.
 
-  // HACK: Yield if Read() is called too often.  On older platforms which are
-  // still using the WaveOut backend, we run into synchronization issues where
-  // the renderer has not finished filling the shared memory when Read() is
-  // called.  Reading too early will lead to clicks and pops.  See issues:
-  // http://crbug.com/161307 and http://crbug.com/61022
-  callback_->WaitTillDataReady();
-
   // TODO(sergeyu): Specify correct hardware delay for AudioBuffersState.
   int frames_filled = callback_->OnMoreData(
       audio_bus_.get(), AudioBuffersState(pending_bytes_, 0));