ref: afd2f68daef62d1185ba1e65971fdd3a7fc1d8eb
dir: /third_party/libwebm/README.libvpx/
URL: https://chromium.googlesource.com/webm/libwebm Version: b6de61a5c0d441c91afb0785e3b26efd2f9e7337 License: BSD License File: LICENSE.txt Description: libwebm is used to handle WebM container I/O.