Moved AudioUtil static functions to AudioManager interfaces

media/audio/pulse/audio_manager_pulse.cc

Index: media/audio/pulse/audio_manager_pulse.cc
diff --git a/media/audio/pulse/audio_manager_pulse.cc b/media/audio/pulse/audio_manager_pulse.cc
index f448fcea59d22d041f75af5d87d56d4a9598cb37..6fe1914376d6b5ad52cef2b14fe4f99f0a441b08 100644
--- a/media/audio/pulse/audio_manager_pulse.cc
+++ b/media/audio/pulse/audio_manager_pulse.cc
@@ -11,12 +11,13 @@
 #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/audio_parameters.h"
 #include "media/audio/linux/audio_manager_linux.h"
 #include "media/audio/pulse/pulse_input.h"
 #include "media/audio/pulse/pulse_output.h"
 #include "media/audio/pulse/pulse_stubs.h"
 #include "media/audio/pulse/pulse_util.h"
+#include "media/base/channel_layout.h"
 
 using media_audio_pulse::kModulePulse;
 using media_audio_pulse::InitializeStubs;
@@ -90,6 +91,24 @@ void AudioManagerPulse::GetAudioInputDeviceNames(
   }
 }
 
+AudioParameters AudioManagerPulse::GetDefaultOutputStreamParameters() {
+  static const int kDefaultOutputBufferSize = 512;
+
+  return AudioParameters(
+      AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO,
+      GetNativeSampleRate(), kDefaultBitsPerSample, kDefaultOutputBufferSize);
+}
+
+AudioParameters AudioManagerPulse::GetDefaultInputStreamParameters(
+    const std::string& device_id) {
+  static const int kDefaultInputBufferSize = 1024;
+
+  // TODO(xians): add support for querying native channel layout for pulse.
+  return AudioParameters(
+      AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO,
+      GetNativeSampleRate(), kDefaultBitsPerSample, kDefaultInputBufferSize);
+}
+
 AudioOutputStream* AudioManagerPulse::MakeLinearOutputStream(
     const AudioParameters& params) {
   DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format());
@@ -128,9 +147,9 @@ AudioInputStream* AudioManagerPulse::MakeInputStream(
 AudioParameters AudioManagerPulse::GetPreferredLowLatencyOutputStreamParameters(
     const AudioParameters& input_params) {
   // TODO(xians): figure out the optimized buffer size for the Pulse IO.
-  int buffer_size = GetAudioHardwareBufferSize();
-  if (input_params.frames_per_buffer() < buffer_size)
-    buffer_size = input_params.frames_per_buffer();
+  AudioParameters default_params = GetDefaultOutputStreamParameters();
+  int buffer_size = std::min(input_params.frames_per_buffer(),
+                             default_params.frames_per_buffer());
 
   // TODO(dalecurtis): This should include bits per channel and channel layout
   // eventually.