cc: Remove the opaque rect return-parameter from ContentLayerClient.

cc/resources/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_RESOURCES_TILE_H_
 #define CC_RESOURCES_TILE_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 106 matching lines @@
   }
 
   const ManagedTileState::TileVersion& GetTileVersionForDrawing() const {
     for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
       if (managed_state_.tile_versions[mode].IsReadyToDraw())
         return managed_state_.tile_versions[mode];
     }
     return managed_state_.tile_versions[HIGH_QUALITY_RASTER_MODE];
   }
 
-  gfx::Rect opaque_rect() const { return opaque_rect_; }
   float contents_scale() const { return contents_scale_; }
   gfx::Rect content_rect() const { return content_rect_; }
 
   int layer_id() const { return layer_id_; }
 
   int source_frame_number() const { return source_frame_number_; }
 
   void set_picture_pile(scoped_refptr<PicturePileImpl> pile) {
     DCHECK(pile->CanRaster(contents_scale_, content_rect_))
         << "Recording rect: "
@@ skipping 22 matching lines @@
   friend class PrioritizedTileSet;
   friend class FakeTileManager;
   friend class BinComparator;
   friend class FakePictureLayerImpl;
 
   // Methods called by by tile manager.
   Tile(TileManager* tile_manager,
        PicturePileImpl* picture_pile,
        const gfx::Size& tile_size,
        const gfx::Rect& content_rect,
-       const gfx::Rect& opaque_rect,
        float contents_scale,
        int layer_id,
        int source_frame_number,
        int flags);
   ~Tile();
 
   ManagedTileState& managed_state() { return managed_state_; }
   const ManagedTileState& managed_state() const { return managed_state_; }
   RasterMode DetermineRasterModeForResolution(TileResolution resolution) const;
 
   bool HasRasterTask() const;
 
   TileManager* tile_manager_;
   scoped_refptr<PicturePileImpl> picture_pile_;
   gfx::Size size_;
   gfx::Rect content_rect_;
   float contents_scale_;
-  gfx::Rect opaque_rect_;
   bool is_occluded_[NUM_TREES];
 
   TilePriority priority_[NUM_TREES];
   ManagedTileState managed_state_;
   int layer_id_;
   int source_frame_number_;
   int flags_;
   bool is_shared_;
 
   Id id_;
   static Id s_next_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Tile);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_H_