Bug 1551735 - Expose bindings to the Renderer's composition recorder structures r=kvark
Bug 1551735 - Expose bindings to the Renderer's composition recorder structures r=kvark

Differential Revision: https://phabricator.services.mozilla.com/D32233

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/6154bdfe6fad96980583857e001187abb84f3c18

servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender