The defaultVideoPosterURL setting has been added in https://bugs.webkit.org/show_bug.cgi?id=110263, this added methods to access it in Chromium.
Created attachment 193173 [details] Patch
Please wait for approval from abarth@webkit.org, dglazkov@chromium.org, fishd@chromium.org, jamesr@chromium.org or tkent@chromium.org before submitting, as this patch contains changes to the Chromium public API. See also https://trac.webkit.org/wiki/ChromiumWebKitAPI.
Created attachment 193316 [details] Patch
Comment on attachment 193316 [details] Patch Clearing flags on attachment: 193316 Committed r146070: <http://trac.webkit.org/changeset/146070>
All reviewed patches have been landed. Closing bug.