Split gfxReusableSurfaceWrapper into gfxReusableSurfaceWrapper and
gfxReusableSharedImageSurfaceWrapper, to allow for non gfxSharedImage-based
implementations.
--HG--
rename : gfx/thebes/gfxReusableSurfaceWrapper.cpp => gfx/thebes/gfxReusableSharedImageSurfaceWrapper.cpp
The tiles backend passes raw pointers to transfer tiled buffers between the
main thread and the compositor. This patch changes that to use shared
memory and tile descriptors instead, as well as changing the memory management
slightly to facilitate that.