Revert r53885 "deps roll for new ffmpeg and switch to av_register_protocol2"

media/test/ffmpeg_tests/ffmpeg_tests.cc

Index: media/test/ffmpeg_tests/ffmpeg_tests.cc
diff --git a/media/test/ffmpeg_tests/ffmpeg_tests.cc b/media/test/ffmpeg_tests/ffmpeg_tests.cc
index f8da45cdff96e40bf72edc00460df375ca8f0c47..a967bc3b35bbb544b9944252ad17551327caa703 100644
--- a/media/test/ffmpeg_tests/ffmpeg_tests.cc
+++ b/media/test/ffmpeg_tests/ffmpeg_tests.cc
@@ -115,7 +115,7 @@ int main(int argc, const char** argv) {
   avcodec_init();
   av_log_set_level(verbose_level);
   av_register_all();
-  av_register_protocol2(&kFFmpegFileProtocol, sizeof(kFFmpegFileProtocol));
+  av_register_protocol(&kFFmpegFileProtocol);
   AVFormatContext* format_context = NULL;
   // av_open_input_file wants a char*, which can't work with wide paths.
   // So we assume ASCII on Windows.  On other platforms we can pass the