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

cc/layers/solid_color_scrollbar_layer.cc

 // Copyright 2013 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.
 
 #include "cc/layers/solid_color_scrollbar_layer.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/layers/solid_color_scrollbar_layer_impl.h"
 
@@ skipping 50 matching lines @@
 }
 
 void SolidColorScrollbarLayer::PushScrollClipPropertiesTo(LayerImpl* layer) {
   SolidColorScrollbarLayerImpl* scrollbar_layer =
       static_cast<SolidColorScrollbarLayerImpl*>(layer);
 
   scrollbar_layer->SetScrollLayerAndClipLayerByIds(scroll_layer_id_,
                                                    clip_layer_id_);
 }
 
-void SolidColorScrollbarLayer::SetNeedsDisplayRect(const gfx::RectF&) {
+void SolidColorScrollbarLayer::SetNeedsDisplayRect(const gfx::Rect& rect) {
   // Never needs repaint.
 }
 
 bool SolidColorScrollbarLayer::OpacityCanAnimateOnImplThread() const {
   return true;
 }
 
 int SolidColorScrollbarLayer::ScrollLayerId() const {
   return scroll_layer_id_;
 }
@@ skipping 12 matching lines @@
 
   clip_layer_id_ = layer_id;
   SetNeedsFullTreeSync();
 }
 
 ScrollbarOrientation SolidColorScrollbarLayer::orientation() const {
   return orientation_;
 }
 
 }  // namespace cc