ref: d8b26caa712c1a4e040ded3965350b3e9b7b3e3a
dir: /third_party/libwebm/README.libvpx/
URL: https://chromium.googlesource.com/webm/libwebm Version: 249629d46c6e9391f25a90cff6d19075f47474cb License: BSD License File: LICENSE.txt Description: libwebm is used to handle WebM container I/O.