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

media/audio/android/audio_manager_android.cc

Index: media/audio/android/audio_manager_android.cc
===================================================================
--- media/audio/android/audio_manager_android.cc	(revision 194029)
+++ media/audio/android/audio_manager_android.cc	(working copy)
@@ -47,14 +47,13 @@
 
 AudioParameters AudioManagerAndroid::GetInputStreamParameters(
     const std::string& device_id) {
-  // TODO(xians): figure out the right input sample rate and buffer size to
-  // achieve the best audio performance for Android devices.
-  // TODO(xians): query the native channel layout for the specific device.
-  static const int kDefaultSampleRate = 16000;
   static const int kDefaultBufferSize = 1024;
   return AudioParameters(
-      AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO,
-      kDefaultSampleRate, 16, kDefaultBufferSize);
+      AudioParameters::AUDIO_PCM_LOW_LATENCY,
+      CHANNEL_LAYOUT_STEREO,
+      GetNativeOutputSampleRatee(),
+      16,
+      kDefaultBufferSize);
 }
 
 AudioOutputStream* AudioManagerAndroid::MakeLinearOutputStream(
@@ -85,11 +84,10 @@
     const AudioParameters& input_params) {
   // TODO(xians): figure out the right output sample rate and sample rate to
   // achieve the best audio performance for Android devices.
-  static const int kDefaultSampleRate = 16000;
   static const int kDefaultBufferSize = 1024;
 
   ChannelLayout channel_layout = CHANNEL_LAYOUT_STEREO;
-  int sample_rate = kDefaultSampleRate;
+  int sample_rate = GetNativeOutputSampleRatee();
   int buffer_size = kDefaultBufferSize;
   int bits_per_sample = 16;
   int input_channels = 0;