Re-write many calls to WrapUnique() with MakeUnique()

media/audio/fake_audio_input_stream.cc

Index: media/audio/fake_audio_input_stream.cc
diff --git a/media/audio/fake_audio_input_stream.cc b/media/audio/fake_audio_input_stream.cc
index 48ca3e55534189dc55d76aade213635eed50b767..c70f5c02e4e458ef4f2b08fa75cbff440c19b3b0 100644
--- a/media/audio/fake_audio_input_stream.cc
+++ b/media/audio/fake_audio_input_stream.cc
@@ -127,9 +127,9 @@ std::unique_ptr<AudioSourceCallback> FakeAudioInputStream::ChooseSource() {
           << switches::kUseFileForFakeAudioCapture << ".";
       looping = false;
     }
-    return base::WrapUnique(new FileSource(params_, path_to_wav_file, looping));
+    return base::MakeUnique<FileSource>(params_, path_to_wav_file, looping);
   }
-  return base::WrapUnique(new BeepingSource(params_));
+  return base::MakeUnique<BeepingSource>(params_);
 }
 
 void FakeAudioInputStream::BeepOnce() {