Bug 845182 - Implement GetDefaultScaleInternal() on Gonk, r=roc a=hd+
Bug 878029 - Update GetDefaultScaleInternal() in Gonk to match AOSP spec. r=mwu a=hd+
Bug 874295. On non-Android platforms (and eventually for Android), use call GetDefaultScale instead of GetDevicePixelsPerMetaViewportPixel. r=mbrubeck a=hd+
Bug 874295. Fix viewport tests. r=mbrubeck a=hd+
Bug 867703 - Remote default scale value, r=roc a=hd+