cc: Add a tiling iterator that doesn't include borders

cc/base/tiling_data.h

 // Copyright 2010 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_BASE_TILING_DATA_H_
 #define CC_BASE_TILING_DATA_H_
 
 #include <utility>
 
 #include "base/basictypes.h"
@@ skipping 68 matching lines @@
     void done() {
       index_x_ = -1;
       index_y_ = -1;
     }
 
     const TilingData* tiling_data_;
     int index_x_;
     int index_y_;
   };
 
-  // Iterate through all indices whose bounds + border intersect with |rect|.
+  // Iterate through tiles whose bounds + optional border intersect with |rect|.
   class CC_EXPORT Iterator : public BaseIterator {
    public:
     Iterator();
-    Iterator(const TilingData* tiling_data, const gfx::Rect& tiling_rect);
+    Iterator(const TilingData* tiling_data,
+             const gfx::Rect& tiling_rect,
+             bool include_borders);
     Iterator& operator++();
 
    private:
     int left_;
     int right_;
     int bottom_;
   };
 
   // Iterate through all indices whose bounds + border intersect with
   // |consider| but which also do not intersect with |ignore|.
@@ skipping 91 matching lines @@
   int border_texels_;
 
   // These are computed values.
   int num_tiles_x_;
   int num_tiles_y_;
 };
 
 }  // namespace cc
 
 #endif  // CC_BASE_TILING_DATA_H_