Bug 903460 - Apply the async transform after the CSS transform for a given layer. r=

Since the CSS transform includes a 1/resolution scaling factor, the translation
amount in the async transform is now in LayoutDevicePixels instead of LayerPixels.
The shadow tree transform is now effectively:
(1/resolution * rest of CSS transform * async translation * async resolution)
Whereas before it was
(async translation * async resolution * 1/resolution * rest of CSS transform)
Logging
Bug 890280 - Ensure that the APZCTreeManager gets input events in screen coordinates. r=
Bug 890280 - Apply proper transformations when sending inputs to the APZC and back to the DOM. r=
Stash testing hacks