I noticed WebGL is still disabled by default. This is weird since it's been mature for a long time now. I would flip the default similarly to how we enabled MSE in bug #190243. Note: bug #69706 attempted to do this, but failed because there's also a runtime setting.
Created attachment 388286 [details] Patch
Thanks for the patch. If this patch contains new public API please make sure it follows the guidelines for new WebKit2 GTK+ API. See http://trac.webkit.org/wiki/WebKitGTK/AddingNewWebKit2API
Comment on attachment 388286 [details] Patch Patch LGTM, but let's fix the indentation issue reported by the style checker while at it before commiting :)
Oh, and for the record I agree that it seems like a very good idea to have WebGL enabled by default.
Committed r254848: <https://trac.webkit.org/changeset/254848>