cc: Stop converting update rect from int to float to int.

cc/layers/picture_layer.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_LAYERS_PICTURE_LAYER_H_
 #define CC_LAYERS_PICTURE_LAYER_H_
 
 #include "cc/base/invalidation_region.h"
 #include "cc/debug/devtools_instrumentation.h"
 #include "cc/debug/micro_benchmark_controller.h"
@@ skipping 10 matching lines @@
  public:
   static scoped_refptr<PictureLayer> Create(ContentLayerClient* client);
 
   void ClearClient();
 
   // Layer interface.
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(
       LayerTreeImpl* tree_impl) override;
   virtual void SetLayerTreeHost(LayerTreeHost* host) override;
   virtual void PushPropertiesTo(LayerImpl* layer) override;
-  virtual void SetNeedsDisplayRect(const gfx::RectF& layer_rect) override;
+  virtual void SetNeedsDisplayRect(const gfx::Rect& layer_rect) override;
   virtual bool Update(ResourceUpdateQueue* queue,
                       const OcclusionTracker<Layer>* occlusion) override;
   virtual void SetIsMask(bool is_mask) override;
   virtual bool SupportsLCDText() const override;
   virtual skia::RefPtr<SkPicture> GetPicture() const override;
   virtual bool IsSuitableForGpuRasterization() const override;
 
   virtual void RunMicroBenchmark(MicroBenchmark* benchmark) override;
 
   ContentLayerClient* client() { return client_; }
@@ skipping 23 matching lines @@
 
   int update_source_frame_number_;
   bool can_use_lcd_text_last_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureLayer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_H_