cc: Add PictureLayerTilingSet to manage PictureLayerTiling

cc/tile.h

 // Copyright 2012 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_TILE_H_
 #define CC_TILE_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "cc/layer_tree_host_impl.h"
 #include "cc/picture_pile.h"
 #include "cc/resource_provider.h"
 #include "cc/tile_manager.h"
 #include "cc/tile_priority.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 
 namespace cc {
 
 class Tile;
 
-class Tile : public base::RefCounted<Tile> {
+class CC_EXPORT Tile : public base::RefCounted<Tile> {
  public:
   Tile(TileManager* tile_manager,
        PicturePile* picture_pile,
        gfx::Size tile_size,
        GLenum format,
        gfx::Rect rect_inside_picture);
 
   const PicturePile* picture_pile() const {
     return picture_pile_;
   }
@@ skipping 36 matching lines @@
   gfx::Rect rect_inside_picture_;
   gfx::Rect opaque_rect_;
 
   TilePriority priority_[2];
   ManagedTileState managed_state_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TILE_H_