Move some core/platform/graphics/mac files to geometry

Source/platform/geometry/cg/IntSizeCG.cpp

 /*
  * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 22 matching lines @@
 IntSize::IntSize(const CGSize& s) : m_width(static_cast<int>(s.width)), m_height(static_cast<int>(s.height))
 {
 }
 
 IntSize::operator CGSize() const
 {
     return CGSizeMake(m_width, m_height);
 }
 
 }