Replace scoped_ptr with std::unique_ptr in //media/base.

media/base/android/audio_decoder_job.h

Index: media/base/android/audio_decoder_job.h
diff --git a/media/base/android/audio_decoder_job.h b/media/base/android/audio_decoder_job.h
index 8b1b4e9c51fd8aa1e2c6f9a212b3115cd054f096..37a20c85fc1c0db49e7b79f63ad30285c5923509 100644
--- a/media/base/android/audio_decoder_job.h
+++ b/media/base/android/audio_decoder_job.h
@@ -8,6 +8,7 @@
 #include <jni.h>
 #include <stddef.h>
 #include <stdint.h>
+#include <memory>
 #include <vector>
 
 #include "base/callback.h"
@@ -81,7 +82,7 @@ class AudioDecoderJob : public MediaDecoderJob {
   base::TimeDelta base_timestamp_;
 
   // Object to calculate the current audio timestamp for A/V sync.
-  scoped_ptr<AudioTimestampHelper> audio_timestamp_helper_;
+  std::unique_ptr<AudioTimestampHelper> audio_timestamp_helper_;
 
   // The time limit for the next frame to avoid underrun.
   base::TimeTicks next_frame_time_limit_;