Bug 878023 - [Australis] Use repeating instead of stretching for the middle background of hovered tabs in order to avoid seams on OS X due to CoreGraphics not supporting ExtendMode::CLAMP. r=MattN
Bug 965914 - Don't crash when we can't allocate a new surface in CloneAligned. r=Bas
Bug 950511 - Back out part 1 from bug 941095 (DrawTargetCG::SetPermitSubpixelAA) because it's unnecessary and causes bad text rendering in context menus.