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

content/renderer/media/audio_device_factory.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_
 #define CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
+#include "media/base/audio_latency.h"
 #include "media/base/output_device_info.h"
 
 namespace media {
 class AudioRendererSink;
 class SwitchableAudioRendererSink;
 class AudioCapturerSource;
 }
 
 namespace url {
 class Origin;
@@ skipping 17 matching lines @@
     kSourceMediaElement,
     kSourceWebRtc,
     kSourceNonRtcAudioTrack,
     kSourceWebAudioInteractive,
     kSourceWebAudioBalanced,
     kSourceWebAudioPlayback,
     kSourceWebAudioExact,
     kSourceLast = kSourceWebAudioExact  // Only used for validation of format.
   };
 
+  // Maps the source type to the audio latency it requires.
+  static media::AudioLatency::LatencyType GetSourceLatencyType(
+      SourceType source);
+
   // Creates a sink for AudioRendererMixer.
   // |render_frame_id| refers to the RenderFrame containing the entity
   // producing the audio. If |session_id| is nonzero, it is used by the browser
   // to select the correct input device ID and its associated output device, if
   // it exists. If |session_id| is zero, |device_id| and |security_origin|
   // identify the output device to use.
   // If |session_id| is zero and |device_id| and |security_origin| are empty,
   // the default output device will be selected.
   static scoped_refptr<media::AudioRendererSink> NewAudioRendererMixerSink(
       int render_frame_id,
@@ skipping 81 matching lines @@
       int session_id,
       const std::string& device_id,
       const url::Origin& security_origin);
 
   DISALLOW_COPY_AND_ASSIGN(AudioDeviceFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_