UMA stats for browser/renderer audio rendering buffer size mismatch.

media/base/audio_parameters.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/base/audio_parameters.h"
 
 #include "base/logging.h"
 #include "media/base/limits.h"
 
 namespace media {
 
 AudioParameters::AudioParameters()
     : AudioParameters(AUDIO_PCM_LINEAR, CHANNEL_LAYOUT_NONE, 0, 0, 0) {}
 
 AudioParameters::AudioParameters(Format format,
                                  ChannelLayout channel_layout,
                                  int sample_rate,
                                  int bits_per_sample,
-                                 int frames_per_buffer) {
+                                 int frames_per_buffer)
+    : latency_tag_(AudioLatency::LATENCY_COUNT) {

[Henrik Grunell, 2016/08/25 12:52:08]

Nit: Consider a comment on the usage of LATENCY_COUNT. I think that can be good.

   Reset(format, channel_layout, sample_rate, bits_per_sample,
         frames_per_buffer);
 }
 
 AudioParameters::~AudioParameters() {}
 
 AudioParameters::AudioParameters(const AudioParameters&) = default;
 AudioParameters& AudioParameters::operator=(const AudioParameters&) = default;
 
 void AudioParameters::Reset(Format format,
@@ skipping 68 matching lines @@
 
 // static
 AudioParameters AudioParameters::UnavailableDeviceParams() {
   return media::AudioParameters(
       media::AudioParameters::AUDIO_FAKE, media::CHANNEL_LAYOUT_STEREO,
       media::AudioParameters::kAudioCDSampleRate, 16,
       media::AudioParameters::kAudioCDSampleRate / 10);
 }
 
 }  // namespace media