Bug 1052063 - Prevent creating multiple APZC instances for the same ScrollableLayerGuid. r=
Bug 1052063 - Ensure the APZC instances track the cumulative hit test areas of all the layers they map to. r=
Bug 1052063 - Reverse the order of transforms applied for layers during composition. r=
Bug 1052063 - Expand the APZCTreeManagerTester to take care of more boilerplate. r=
Bug 1052063 - Add some tests to ensure layers with the same scrollid get the same APZC. r=
Bug 1052063 - Small changes to clarify the existing ancestor transform build-up. r=
Bug 1052063 - Move the CSS transform into the ancestor transform. r=
Enable logging
Bug 1052063 - Avoid running multiple animation steps if there are multiple layers sharing an APZC. r=
Revert "Bug 1052063 - Avoid running multiple animation steps if there are multiple layers sharing an APZC. r="

This reverts commit b1da59b80842487d1bbf8e7a529002d6c09f1a90.