cc: Replace Region with SimpleEnclosedRegion for occlusion tracking

cc/resources/layer_tiling_data.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_RESOURCES_LAYER_TILING_DATA_H_
 #define CC_RESOURCES_LAYER_TILING_DATA_H_
 
 #include <utility>
 
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
-#include "cc/base/region.h"
+#include "cc/base/simple_enclosed_region.h"
 #include "cc/base/tiling_data.h"
 #include "ui/gfx/rect.h"
 
 namespace cc {
 
 class CC_EXPORT LayerTilingData {
  public:
   enum BorderTexelOption {
     HAS_BORDER_TEXELS,
     NO_BORDER_TEXELS
@@ skipping 58 matching lines @@
   void SetTilingSize(const gfx::Size& tiling_size);
   gfx::Size tiling_size() const { return tiling_data_.tiling_size(); }
 
   void ContentRectToTileIndices(const gfx::Rect& rect,
                                 int* left,
                                 int* top,
                                 int* right,
                                 int* bottom) const;
   gfx::Rect TileRect(const Tile* tile) const;
 
-  Region OpaqueRegionInContentRect(const gfx::Rect& rect) const;
+  SimpleEnclosedRegion OpaqueRegionInContentRect(const gfx::Rect& rect) const;
 
   void reset() { tiles_.clear(); }
 
  protected:
   LayerTilingData(const gfx::Size& tile_size, BorderTexelOption option);
 
   TileMap tiles_;
   TilingData tiling_data_;
 
   DISALLOW_COPY(LayerTilingData);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_LAYER_TILING_DATA_H_