gfx: Make conversions from Size to SizeF be explicit.

ash/drag_drop/drag_image_view.cc

 // Copyright (c) 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.
 
 #include "ash/drag_drop/drag_image_view.h"
 
 #include "skia/ext/image_operations.h"
 #include "ui/aura/window.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/dip_util.h"
@@ skipping 99 matching lines @@
   if (GetImage().size() == widget_size_) {
     canvas->DrawImageInt(GetImage(), 0, 0);
   } else {
     float device_scale = 1;
     if (widget_->GetNativeView() && widget_->GetNativeView()->layer()) {
       device_scale = ui::GetDeviceScaleFactor(
           widget_->GetNativeView()->layer());
     }
     // The drag image already has device scale factor applied. But
     // |widget_size_| is in DIP units.
-    gfx::Size scaled_widget_size = gfx::ToRoundedSize(
-        gfx::ScaleSize(widget_size_, device_scale));
+    gfx::Size scaled_widget_size =
+        gfx::ScaleToRoundedSize(widget_size_, device_scale);
     gfx::ImageSkiaRep image_rep = GetImage().GetRepresentation(device_scale);
     if (image_rep.is_null())
       return;
     SkBitmap scaled = skia::ImageOperations::Resize(
         image_rep.sk_bitmap(), skia::ImageOperations::RESIZE_LANCZOS3,
         scaled_widget_size.width(), scaled_widget_size.height());
     gfx::ImageSkia image_skia(gfx::ImageSkiaRep(scaled, device_scale));
     canvas->DrawImageInt(image_skia, 0, 0);
   }
 
@@ skipping 31 matching lines @@
     gfx::Rect drag_hint_bounds(drag_hint_position, drag_hint_size);
     drag_hint_bounds.AdjustToFit(gfx::Rect(widget_size_));
 
     // Draw image.
     canvas->DrawImageInt(*(drag_hint->ToImageSkia()),
         drag_hint_bounds.x(), drag_hint_bounds.y());
   }
 }
 
 }  // namespace ash