Bug 1264764 - Move PTexture under PCompositorBridge r=nical,dvander

gfx/layers/composite/TextureHost.cpp

gfx/layers/composite/TextureHost.h

gfx/layers/ipc/CompositorBridgeChild.cpp

gfx/layers/ipc/CompositorBridgeChild.h

gfx/layers/ipc/CompositorBridgeParent.cpp

gfx/layers/ipc/CompositorBridgeParent.h

gfx/layers/ipc/LayerTransactionChild.cpp

gfx/layers/ipc/LayerTransactionChild.h

gfx/layers/ipc/LayerTransactionParent.cpp

gfx/layers/ipc/LayerTransactionParent.h

gfx/layers/ipc/PCompositorBridge.ipdl

gfx/layers/ipc/PLayerTransaction.ipdl

gfx/layers/ipc/PTexture.ipdl

gfx/layers/ipc/ShadowLayers.cpp