Audio output debug recording.

media/audio/alsa/alsa_output.cc

 // Copyright 2013 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.
 //
 // THREAD SAFETY
 //
 // AlsaPcmOutputStream object is *not* thread-safe and should only be used
 // from the audio thread.  We DCHECK on this assumption whenever we can.
 //
 // SEMANTICS OF Close()
@@ skipping 332 matching lines @@
 
   volume_ = static_cast<float>(volume);
 }
 
 void AlsaPcmOutputStream::GetVolume(double* volume) {
   DCHECK(CalledOnValidThread());
 
   *volume = volume_;
 }
 
+void AlsaPcmOutputStream::EnableDebugRecording(
+    const base::FilePath& file_name) {
+  // TODO BEFORE COMMIT.
+}
+
+void AlsaPcmOutputStream::DisableDebugRecording() {
+  // TODO BEFORE COMMIT.
+}
+
 void AlsaPcmOutputStream::SetTickClockForTesting(
     std::unique_ptr<base::TickClock> tick_clock) {
   DCHECK(tick_clock);
   tick_clock_ = std::move(tick_clock);
 }
 
 void AlsaPcmOutputStream::BufferPacket(bool* source_exhausted) {
   DCHECK(CalledOnValidThread());
 
   // If stopped, simulate a 0-length packet.
@@ skipping 435 matching lines @@
 }
 
 // Changes the AudioSourceCallback to proxy calls to.  Pass in NULL to
 // release ownership of the currently registered callback.
 void AlsaPcmOutputStream::set_source_callback(AudioSourceCallback* callback) {
   DCHECK(CalledOnValidThread());
   source_callback_ = callback;
 }
 
 }  // namespace media