Bug 957668. Factor out a few helper functions. r=roc
Bug 957668. Add and implement plumbing for a display port margins api. r=kats
Bug 957668. A little cleanup of display port setters in nsDOMWindowUtils.cpp. r=kats
Bug 957668. Set the display port base rect in several places. r=roc
Bug 957668. Calculate and set display ports as margins in layer pixels. r=kats