Bug 1526769 - always initialize local_transform to the identity matrix r=nical
Bug 1526769 - always initialize local_transform to the identity matrix r=nical

[wrupdater] From https://github.com/servo/webrender/pull/3547

Differential Revision: https://phabricator.services.mozilla.com/D19305

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/0d65ca0a00195e03b4b7976d6bbbf5c5cb0c9d93

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