Remove unused function in PictureLayerTiling

cc/resources/picture_layer_tiling.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_RESOURCES_PICTURE_LAYER_TILING_H_
 #define CC_RESOURCES_PICTURE_LAYER_TILING_H_
 
 #include <utility>
 #include <vector>
 
@@ skipping 56 matching lines @@
       }
       return tiling_->tiling_data_.TileBounds(spiral_iterator_.index_x(),
                                               spiral_iterator_.index_y());
     }
 
    private:
     void AdvancePhase();
     bool TileNeedsRaster(Tile* tile) const {
       RasterMode mode = tile->DetermineRasterModeForTree(tree_);
       return tile->NeedsRasterForMode(mode);
-    };
+    }
 
     PictureLayerTiling* tiling_;
 
     TilePriority::PriorityBin type_;
     gfx::Rect visible_rect_in_content_space_;
     gfx::Rect skewport_in_content_space_;
     gfx::Rect eventually_rect_in_content_space_;
     gfx::Rect soon_border_rect_in_content_space_;
     WhichTree tree_;
 
@@ skipping 113 matching lines @@
     int tile_i_;
     int tile_j_;
     int left_;
     int top_;
     int right_;
     int bottom_;
 
     friend class PictureLayerTiling;
   };
 
-  Region OpaqueRegionInContentRect(const gfx::Rect& content_rect) const;
-
   void Reset();
 
   void UpdateTilePriorities(WhichTree tree,
                             const gfx::Rect& visible_layer_rect,
                             float layer_contents_scale,
                             double current_frame_time_in_seconds);
 
   // Copies the src_tree priority into the dst_tree priority for all tiles.
   // The src_tree priority is reset to the lowest priority possible.  This
   // also updates the pile on each tile to be the current client's pile.
@@ skipping 86 matching lines @@
 
  private:
   DISALLOW_ASSIGN(PictureLayerTiling);
 
   RectExpansionCache expansion_cache_;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_LAYER_TILING_H_