cc: Do the math for a tile's content rect in layer space once.

cc/tiles/tile_manager.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_TILES_TILE_MANAGER_H_
 #define CC_TILES_TILE_MANAGER_H_
 
 #include <deque>
 #include <queue>
 #include <set>
@@ skipping 115 matching lines @@
   // FinishTasksAndCleanUp must be called in between consecutive calls to
   // SetResources.
   void SetResources(ResourcePool* resource_pool,
                     TileTaskRunner* tile_task_runner,
                     size_t scheduled_raster_task_limit);
 
   // This causes any completed raster work to finalize, so that tiles get up to
   // date draw information.
   void Flush();
 
-  ScopedTilePtr CreateTile(const gfx::Size& desired_texture_size,
-                           const gfx::Rect& content_rect,
-                           float contents_scale,
+  ScopedTilePtr CreateTile(const Tile::CreateInfo& info,
                            int layer_id,
                            int source_frame_number,
                            int flags);
 
   bool IsReadyToActivate() const;
   bool IsReadyToDraw() const;
 
   scoped_refptr<base::trace_event::ConvertableToTraceFormat> BasicStateAsValue()
       const;
   void BasicStateAsValueInto(base::trace_event::TracedValue* dict) const;
@@ skipping 180 matching lines @@
   bool has_scheduled_tile_tasks_;
 
   uint64_t prepare_tiles_count_;
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_TILE_MANAGER_H_