Check VideoFrame::IsValidConfig() prior to allocating buffers for FFmpeg.

media/filters/ffmpeg_video_decoder.cc

Index: media/filters/ffmpeg_video_decoder.cc
diff --git a/media/filters/ffmpeg_video_decoder.cc b/media/filters/ffmpeg_video_decoder.cc
index ca26e8eb3730403068abc3129ad45e00e31ebe2d..ba0fd8d773793814e2e21d4fec02537e6f33d4d7 100644
--- a/media/filters/ffmpeg_video_decoder.cc
+++ b/media/filters/ffmpeg_video_decoder.cc
@@ -89,6 +89,9 @@ int FFmpegVideoDecoder::GetVideoBuffer(AVCodecContext* codec_context,
     natural_size = demuxer_stream_->video_decoder_config().natural_size();
   }
 
+  if (!VideoFrame::IsValidConfig(format, size, natural_size))
+    return AVERROR(EINVAL);
+
   scoped_refptr<VideoFrame> video_frame =
       VideoFrame::CreateFrame(format, size, natural_size, kNoTimestamp());