Convert //media/audio from scoped_ptr to std::unique_ptr

media/audio/sounds/wav_audio_handler.cc

Index: media/audio/sounds/wav_audio_handler.cc
diff --git a/media/audio/sounds/wav_audio_handler.cc b/media/audio/sounds/wav_audio_handler.cc
index a7c2b1464fe0d42dff355b9f56692d2ee0ec22fe..8f934cc3ff835360ac44148520acc09f651dc2a8 100644
--- a/media/audio/sounds/wav_audio_handler.cc
+++ b/media/audio/sounds/wav_audio_handler.cc
@@ -8,6 +8,7 @@
 #include <cstring>
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/sys_byteorder.h"
 #include "build/build_config.h"
 #include "media/base/audio_bus.h"
@@ -174,18 +175,18 @@ WavAudioHandler::WavAudioHandler(base::StringPiece audio_data,
 WavAudioHandler::~WavAudioHandler() {}
 
 // static
-scoped_ptr<WavAudioHandler> WavAudioHandler::Create(
+std::unique_ptr<WavAudioHandler> WavAudioHandler::Create(
     const base::StringPiece wav_data) {
   WavAudioParameters params;
   base::StringPiece audio_data;
 
   // Attempt to parse the WAV data.
   if (!ParseWavData(wav_data, &audio_data, &params))
-    return scoped_ptr<WavAudioHandler>();
+    return nullptr;
 
-  return make_scoped_ptr(new WavAudioHandler(audio_data, params.num_channels,
-                                             params.sample_rate,
-                                             params.bits_per_sample));
+  return base::WrapUnique(new WavAudioHandler(audio_data, params.num_channels,
+                                              params.sample_rate,
+                                              params.bits_per_sample));
 }
 
 bool WavAudioHandler::AtEnd(size_t cursor) const {