Chromium DEPS pulls in a versioned copy of the Chrome OS third_party/libdrm. Ideally the hash should be rolled with each ebuild uprev (but not essential for each local patch).

Please monitor after each libdrm uprev the Chrome OS LKGM builds. Look for amd64-generic and betty failures in ozone_unittests, especially failures affecting Display and DRM. If such failures appear this may indicate a need to adjust the structures in mock_drm_device.h.