Bug 786412. Conslidate container layer methods. r=mattwoodrow
Bug 898929. Replace assertion with warning in gfxASurface.cpp. r=roc
Bug 904073. Don't crash if we can't get a texture for a render target. r=Bas
Bug 910158. Don't include BasicLayers.h unnecessarily. r=roc
BUg 910160. IWYU for gfx/src. r=roc