Remove unused flush operation from Chromium audio.

media/audio/audio_output_device.cc

 // Copyright (c) 2012 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 "media/audio/audio_output_device.h"
 
 #include "base/debug/trace_event.h"
 #include "base/message_loop.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time.h"
@@ skipping 71 matching lines @@
 
   message_loop()->PostTask(FROM_HERE,
       base::Bind(&AudioOutputDevice::ShutDownOnIOThread, this));
 }
 
 void AudioOutputDevice::Play() {
   message_loop()->PostTask(FROM_HERE,
       base::Bind(&AudioOutputDevice::PlayOnIOThread, this));
 }
 
-void AudioOutputDevice::Pause(bool flush) {
+void AudioOutputDevice::Pause() {
   message_loop()->PostTask(FROM_HERE,
-      base::Bind(&AudioOutputDevice::PauseOnIOThread, this, flush));
+      base::Bind(&AudioOutputDevice::PauseOnIOThread, this));
 }
 
 bool AudioOutputDevice::SetVolume(double volume) {
   if (volume < 0 || volume > 1.0)
     return false;
 
   if (!message_loop()->PostTask(FROM_HERE,
           base::Bind(&AudioOutputDevice::SetVolumeOnIOThread, this, volume))) {
     return false;
   }
@@ skipping 14 matching lines @@
   DCHECK(message_loop()->BelongsToCurrentThread());
   if (state_ == PAUSED) {
     ipc_->PlayStream(stream_id_);
     state_ = PLAYING;
     play_on_start_ = false;
   } else {
     play_on_start_ = true;
   }
 }
 
-void AudioOutputDevice::PauseOnIOThread(bool flush) {
+void AudioOutputDevice::PauseOnIOThread() {
   DCHECK(message_loop()->BelongsToCurrentThread());
   if (state_ == PLAYING) {
     ipc_->PauseStream(stream_id_);
-    if (flush)
-      ipc_->FlushStream(stream_id_);
     state_ = PAUSED;
-  } else {
-    // Note that |flush| isn't relevant here since this is the case where
-    // the stream is first starting.
   }
   play_on_start_ = false;
 }
 
 void AudioOutputDevice::ShutDownOnIOThread() {
   DCHECK(message_loop()->BelongsToCurrentThread());
 
   // Make sure we don't call shutdown more than once.
   if (state_ >= CREATING_STREAM) {
     ipc_->CloseStream(stream_id_);
@@ skipping 176 matching lines @@
   // TODO(dalecurtis): Technically this is not always correct.  Due to channel
   // padding for alignment, there may be more data available than this.  We're
   // relying on AudioSyncReader::Read() to parse this with that in mind.  Rename
   // these methods to Set/GetActualFrameCount().
   SetActualDataSizeInBytes(
       &shared_memory_, memory_length_,
       num_frames * sizeof(*output_bus_->channel(0)) * output_bus_->channels());
 }
 
 }  // namespace media.