Add JPEG decoder for VAAPI JPEG decode acceleration

content/renderer/pepper/ppb_video_decoder_impl.cc

Index: content/renderer/pepper/ppb_video_decoder_impl.cc
diff --git a/content/renderer/pepper/ppb_video_decoder_impl.cc b/content/renderer/pepper/ppb_video_decoder_impl.cc
index ca052ea8b560547db6a45438d73ce99cfc253107..32598d92910f22256b42a0ac1347944b5520fbfb 100644
--- a/content/renderer/pepper/ppb_video_decoder_impl.cc
+++ b/content/renderer/pepper/ppb_video_decoder_impl.cc
@@ -67,6 +67,8 @@ media::VideoCodecProfile PPToMediaProfile(
       return media::H264PROFILE_MULTIVIEWHIGH;
     case PP_VIDEODECODER_VP8PROFILE_ANY:
       return media::VP8PROFILE_ANY;
+    case PP_VIDEODECODER_MJPEGPROFILE:
+      return media::MJPEGPROFILE;
     default:
       return media::VIDEO_CODEC_PROFILE_UNKNOWN;
   }