Roll FFmpeg for M37.

media/ffmpeg/ffmpeg_common.h

Index: media/ffmpeg/ffmpeg_common.h
diff --git a/media/ffmpeg/ffmpeg_common.h b/media/ffmpeg/ffmpeg_common.h
index c697bee69f40772db371cd00a05a0d6e935969eb..ef1a7b6a7620cbabdf534be3797ea27842402c19 100644
--- a/media/ffmpeg/ffmpeg_common.h
+++ b/media/ffmpeg/ffmpeg_common.h
@@ -19,6 +19,14 @@
 
 // Include FFmpeg header files.
 extern "C" {
+// Disable deprecated features which result in spammy compile warnings.  This
+// list of defines must mirror those in the 'defines' section of the ffmpeg.gyp
+// file or the headers below will generate different structures.
+#define FF_API_PIX_FMT_DESC 0
+#define FF_API_OLD_DECODE_AUDIO 0
+#define FF_API_DESTRUCT_PACKET 0
+#define FF_API_GET_BUFFER 0
+
 // Temporarily disable possible loss of data warning.
 // TODO(scherkus): fix and upstream the compiler warnings.
 MSVC_PUSH_DISABLE_WARNING(4244);
@@ -61,7 +69,7 @@ inline void ScopedPtrAVFreeContext::operator()(void* x) const {
 
 inline void ScopedPtrAVFreeFrame::operator()(void* x) const {
   AVFrame* frame = static_cast<AVFrame*>(x);
-  avcodec_free_frame(&frame);
+  av_frame_free(&frame);
 }
 
 // Converts an int64 timestamp in |time_base| units to a base::TimeDelta.