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

media/filters/ffmpeg_h264_to_annex_b_bitstream_converter.cc

Index: media/filters/ffmpeg_h264_to_annex_b_bitstream_converter.cc
diff --git a/media/filters/ffmpeg_h264_to_annex_b_bitstream_converter.cc b/media/filters/ffmpeg_h264_to_annex_b_bitstream_converter.cc
index 017e27c33d888780dc3820c9f742209a16bea4c6..356ea4f80f21eb84226a19930787be67876580f4 100644
--- a/media/filters/ffmpeg_h264_to_annex_b_bitstream_converter.cc
+++ b/media/filters/ffmpeg_h264_to_annex_b_bitstream_converter.cc
@@ -22,7 +22,7 @@ FFmpegH264ToAnnexBBitstreamConverter::FFmpegH264ToAnnexBBitstreamConverter(
 FFmpegH264ToAnnexBBitstreamConverter::~FFmpegH264ToAnnexBBitstreamConverter() {}
 
 bool FFmpegH264ToAnnexBBitstreamConverter::ConvertPacket(AVPacket* packet) {
-  scoped_ptr<mp4::AVCDecoderConfigurationRecord> avc_config;
+  std::unique_ptr<mp4::AVCDecoderConfigurationRecord> avc_config;
 
   if (packet == NULL || !packet->data)
     return false;