cc: Create a Region class that wraps SkRegion, to replace use of WebCore::Region.

cc/layer_impl.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_LAYER_IMPL_H_
 #define CC_LAYER_IMPL_H_
 
 #include <string>
 
-#include "Region.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/cc_export.h"
 #include "cc/input_handler.h"
 #include "cc/layer_animation_controller.h"
+#include "cc/region.h"
 #include "cc/render_pass.h"
 #include "cc/render_surface_impl.h"
 #include "cc/resource_provider.h"
 #include "cc/scoped_ptr_vector.h"
 #include "cc/shared_quad_state.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/rect_f.h"
 #include <public/WebFilterOperations.h>
 #include <public/WebTransformationMatrix.h>
@@ skipping 388 matching lines @@
     scoped_ptr<ScrollbarAnimationController> m_scrollbarAnimationController;
 
     DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 void sortLayers(std::vector<LayerImpl*>::iterator first, std::vector<LayerImpl*>::iterator end, LayerSorter*);
 
 }
 
 #endif  // CC_LAYER_IMPL_H_