gfx: Make conversions from Size to SizeF be explicit.

content/browser/frame_host/render_widget_host_view_child_frame.cc

 // Copyright 2014 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 "content/browser/frame_host/render_widget_host_view_child_frame.h"
 
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_manager.h"
 #include "cc/surfaces/surface_sequence.h"
@@ skipping 112 matching lines @@
   NOTREACHED();
   return NULL;
 }
 
 void RenderWidgetHostViewChildFrame::SetBackgroundColor(SkColor color) {
 }
 
 gfx::Size RenderWidgetHostViewChildFrame::GetPhysicalBackingSize() const {
   gfx::Size size;
   if (frame_connector_) {
-    size = gfx::ToCeiledSize(
-        gfx::ScaleSize(frame_connector_->ChildFrameRect().size(),
-                       frame_connector_->device_scale_factor()));
+    size = gfx::ScaleToCeiledSize(frame_connector_->ChildFrameRect().size(),
+                                  frame_connector_->device_scale_factor());
   }
   return size;
 }
 
 void RenderWidgetHostViewChildFrame::InitAsPopup(
     RenderWidgetHostView* parent_host_view,
     const gfx::Rect& bounds) {
   NOTREACHED();
 }
 
@@ skipping 325 matching lines @@
       BrowserAccessibilityManager::GetEmptyDocument(), delegate);
 }
 
 void RenderWidgetHostViewChildFrame::ClearCompositorSurfaceIfNecessary() {
   if (surface_factory_ && !surface_id_.is_null())
     surface_factory_->Destroy(surface_id_);
   surface_id_ = cc::SurfaceId();
 }
 
 }  // namespace content