Moved AudioUtil static functions to AudioManager interfaces

media/audio/mock_audio_manager.cc

Index: media/audio/mock_audio_manager.cc
diff --git a/media/audio/mock_audio_manager.cc b/media/audio/mock_audio_manager.cc
index 4cd5f2159a5644b25a541cc4f15418f334d312c7..0325ce81079b9c1c69ea5a82d3895497fade09ac 100644
--- a/media/audio/mock_audio_manager.cc
+++ b/media/audio/mock_audio_manager.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "base/message_loop_proxy.h"
+#include "media/audio/audio_parameters.h"
 
 namespace media {
 
@@ -70,4 +71,13 @@ void MockAudioManager::RemoveOutputDeviceChangeListener(
     AudioDeviceListener* listener) {
 }
 
+AudioParameters MockAudioManager::GetDefaultOutputStreamParameters() {
+  return AudioParameters();
+}
+
+AudioParameters MockAudioManager::GetDefaultInputStreamParameters(
+    const std::string& device_id) {
+  return AudioParameters();
+}
+
 }  // namespace media.