Refactor the Get*Hardware* routines a bit.

content/renderer/media/webrtc_audio_device_unittest.cc

Index: content/renderer/media/webrtc_audio_device_unittest.cc
===================================================================
--- content/renderer/media/webrtc_audio_device_unittest.cc	(revision 110480)
+++ content/renderer/media/webrtc_audio_device_unittest.cc	(working copy)
@@ -117,7 +117,7 @@
 // WebRtcAudioDeviceImpl.
 TEST_F(WebRTCAudioDeviceTest, Construct) {
   AudioUtilNoHardware audio_util(48000.0, 48000.0);
-  set_audio_util_callback(&audio_util);
+  SetAudioUtilCallback(&audio_util);
   scoped_refptr<WebRtcAudioDeviceImpl> audio_device(
       new WebRtcAudioDeviceImpl());
   audio_device->SetSessionId(1);
@@ -142,7 +142,7 @@
     return;
 
   AudioUtil audio_util;
-  set_audio_util_callback(&audio_util);
+  SetAudioUtilCallback(&audio_util);
 
   EXPECT_CALL(media_observer(),
       OnSetAudioStreamStatus(_, 1, StrEq("created"))).Times(1);
@@ -211,7 +211,7 @@
     return;
 
   AudioUtil audio_util;
-  set_audio_util_callback(&audio_util);
+  SetAudioUtilCallback(&audio_util);
 
   // TODO(tommi): extend MediaObserver and MockMediaObserver with support
   // for new interfaces, like OnSetAudioStreamRecording(). When done, add
@@ -278,7 +278,7 @@
       GetTestDataPath(FILE_PATH_LITERAL("speechmusic_mono_16kHz.pcm")));
 
   AudioUtil audio_util;
-  set_audio_util_callback(&audio_util);
+  SetAudioUtilCallback(&audio_util);
 
   EXPECT_CALL(media_observer(),
       OnSetAudioStreamStatus(_, 1, StrEq("created"))).Times(1);
@@ -335,7 +335,7 @@
     return;
 
   AudioUtil audio_util;
-  set_audio_util_callback(&audio_util);
+  SetAudioUtilCallback(&audio_util);
 
   scoped_refptr<WebRtcAudioDeviceImpl> audio_device(
       new WebRtcAudioDeviceImpl());