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

media/filters/android/media_codec_audio_decoder.cc

Index: media/filters/android/media_codec_audio_decoder.cc
diff --git a/media/filters/android/media_codec_audio_decoder.cc b/media/filters/android/media_codec_audio_decoder.cc
index c3bca6a7cee874e0e1bd32dbababa53a3c028736..6a3a8bb286b270fc0037304da7e0e917c7961b86 100644
--- a/media/filters/android/media_codec_audio_decoder.cc
+++ b/media/filters/android/media_codec_audio_decoder.cc
@@ -41,11 +41,12 @@ inline int GetChannelCount(const AudioDecoderConfig& config) {
   return ChannelLayoutToChannelCount(config.channel_layout());
 }
 
-scoped_ptr<MediaCodecBridge> CreateMediaCodec(const AudioDecoderConfig& config,
-                                              jobject media_crypto) {
+std::unique_ptr<MediaCodecBridge> CreateMediaCodec(
+    const AudioDecoderConfig& config,
+    jobject media_crypto) {
   DVLOG(1) << __FUNCTION__ << ": config:" << config.AsHumanReadableString();
 
-  scoped_ptr<AudioCodecBridge> audio_codec_bridge(
+  std::unique_ptr<AudioCodecBridge> audio_codec_bridge(
       AudioCodecBridge::Create(config.codec()));
   if (!audio_codec_bridge) {
     DVLOG(0) << __FUNCTION__ << " failed: cannot create AudioCodecBridge";