Bug 950677 - gfxIntSize -> IntSize in ipc/ directory. r=nical

(Detail: Chose to put an #include for Point.h in a header instead of a
forward declaration because a fwd decl caused an "Already defined" error
and having neither fwd decl or #include caused another compile failure
saying IntSize was undefined)

gfx/layers/ipc/ShadowLayerUtilsMac.cpp

@@ -5,11 +5,13 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+#include "mozilla/gfx/Point.h"
 #include "mozilla/layers/PLayerTransaction.h"
 #include "mozilla/layers/ShadowLayers.h"
 #include "mozilla/layers/LayerManagerComposite.h"
 #include "mozilla/layers/CompositorTypes.h"
 
+#include "gfx2DGlue.h"
 #include "gfxPlatform.h"
 
 #include "gfxSharedQuartzSurface.h"
@@ -20,7 +22,7 @@ namespace mozilla {
 namespace layers {
 
 bool
-ISurfaceAllocator::PlatformAllocSurfaceDescriptor(const gfxIntSize& aSize,
+ISurfaceAllocator::PlatformAllocSurfaceDescriptor(const gfx::IntSize& aSize,
                                                   gfxContentType aContent,
                                                   uint32_t aCaps,
                                                   SurfaceDescriptor* aBuffer)
@@ -41,7 +43,7 @@ ShadowLayerForwarder::PlatformOpenDescriptor(OpenMode aMode,
 
     nsRefPtr<gfxASurface> surf =
       new gfxQuartzSurface((unsigned char*)image.data(),
-                           image.size(),
+                           gfx::ThebesIntSize(image.size()),
                            image.stride(),
                            format);
     return surf.forget();