Bug 991575 - Stop PresShell::GetReferenceRenderingContext from creating a Thebes backed gfxContext (Moz2D migration). r=mattwoodrow
Bug 991572 - Stop creating a Thebes backed gfxContext in CanvasRenderingContext2D.cpp, and kill off nsICanvasRenderingContextInternal::GetThebesSurface (Moz2D migration). r=mattwoodrow