Moved AudioUtil static functions to AudioManager interfaces

media/audio/cras/audio_manager_cras.cc

Index: media/audio/cras/audio_manager_cras.cc
diff --git a/media/audio/cras/audio_manager_cras.cc b/media/audio/cras/audio_manager_cras.cc
index 3401cc5f62310cd41b423084013c9f30e2a0827f..9565ebd8bdeb0ed31ecf8f5a7a65e0559cfd48ab 100644
--- a/media/audio/cras/audio_manager_cras.cc
+++ b/media/audio/cras/audio_manager_cras.cc
@@ -10,15 +10,18 @@
 #include "base/nix/xdg_util.h"
 #include "base/process_util.h"
 #include "base/stl_util.h"
-#include "media/audio/audio_util.h"
 #include "media/audio/cras/cras_input.h"
 #include "media/audio/cras/cras_output.h"
+#include "media/base/channel_layout.h"
 
 namespace media {
 
 // Maximum number of output streams that can be open simultaneously.
 static const int kMaxOutputStreams = 50;
 
+// Default sample rate for input and output streams.
+static const int kDefaultSampleRate = 48000;
+
 static const char kCrasAutomaticDeviceName[] = "Automatic";
 static const char kCrasAutomaticDeviceId[] = "automatic";
 
@@ -49,6 +52,23 @@ void AudioManagerCras::GetAudioInputDeviceNames(
   return;
 }
 
+AudioParameters AudioManagerCras::GetDefaultOutputStreamParameters() {
+  static const int kDefaultOutputBufferSize = 512;
+
+  return AudioParameters(
+      AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO,
+      kDefaultSampleRate, 16, kDefaultOutputBufferSize);
+}
+
+AudioParameters AudioManagerCras::GetDefaultInputStreamParameters(
+    const std::string& device_id) {
+  static const int kDefaultInputBufferSize = 1024;
+
+  return AudioParameters(
+      AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO,
+      kDefaultSampleRate, 16, kDefaultInputBufferSize);
+}
+
 void AudioManagerCras::GetCrasAudioInputDevices(
     media::AudioDeviceNames* device_names) {
   // Cras will route audio from a proper physical device automatically.