libvpx: Pull from upstream

source/libvpx/webmenc.cc

Index: source/libvpx/webmenc.cc
diff --git a/source/libvpx/webmenc.cc b/source/libvpx/webmenc.cc
index 8212ee36cf62c031509f6425257434e24a87f336..d41e700443c6cf941f61fe9171687508257498c6 100644
--- a/source/libvpx/webmenc.cc
+++ b/source/libvpx/webmenc.cc
@@ -49,7 +49,22 @@ void write_webm_file_header(struct EbmlGlobal *glob,
       static_cast<mkvmuxer::VideoTrack*>(
           segment->GetTrackByNumber(video_track_id));
   video_track->SetStereoMode(stereo_fmt);
-  video_track->set_codec_id(fourcc == VP8_FOURCC ? "V_VP8" : "V_VP9");
+  const char *codec_id;
+  switch (fourcc) {
+  case VP8_FOURCC:
+    codec_id = "V_VP8";
+    break;
+  case VP9_FOURCC:
+    codec_id = "V_VP9";
+    break;
+  case VP10_FOURCC:
+    codec_id = "V_VP10";
+    break;
+  default:
+    codec_id = "V_VP10";
+    break;
+  }
+  video_track->set_codec_id(codec_id);
   if (par->numerator > 1 || par->denominator > 1) {
     // TODO(fgalligan): Add support of DisplayUnit, Display Aspect Ratio type
     // to WebM format.