Set default sampling rate to 44100 and query the native output sampling rate.

media/audio/audio_manager_base.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 MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_
 #define MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 118 matching lines @@
   // will decide if they should return the values from |input_params| or the
   // default hardware values. If the |input_params| is invalid, it will return
   // the default hardware audio parameters.
   virtual AudioParameters GetPreferredOutputStreamParameters(
       const AudioParameters& input_params) = 0;
 
   // Map of cached AudioOutputDispatcher instances.  Must only be touched
   // from the audio thread (no locking).
   AudioOutputDispatchersMap output_dispatchers_;
 
+#if defined(OS_ANDROID)
+  int GetNativeOutputSampleRatee();
+#endif
+
  private:
   // Called by Shutdown().
   void ShutdownOnAudioThread();
 
 #if defined(OS_ANDROID)
   void SetAudioMode(int mode);
   void RegisterHeadsetReceiver();
   void UnregisterHeadsetReceiver();
 #endif
 
@@ skipping 30 matching lines @@
   // Java AudioManager instance.
   base::android::ScopedJavaGlobalRef<jobject> j_audio_manager_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(AudioManagerBase);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_