gfx: Make conversions from Size to SizeF be explicit.

ui/base/cursor/cursor_util.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 "ui/base/cursor/cursor_util.h"
 
 #include "base/logging.h"
 #include "skia/ext/image_operations.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/geometry/point_conversions.h"
@@ skipping 30 matching lines @@
   }
 
   if (scale < FLT_EPSILON) {
     NOTREACHED() << "Scale must be larger than 0.";
     scale = 1.0f;
   }
 
   if (scale == 1.0f)
     return;
 
-  gfx::Size scaled_size = gfx::ToFlooredSize(
-      gfx::ScaleSize(gfx::Size(bitmap->width(), bitmap->height()), scale));
+  gfx::Size scaled_size = gfx::ScaleToFlooredSize(
+      gfx::Size(bitmap->width(), bitmap->height()), scale);
 
   *bitmap = skia::ImageOperations::Resize(
       *bitmap,
       skia::ImageOperations::RESIZE_BETTER,
       scaled_size.width(),
       scaled_size.height());
   *hotpoint = gfx::ToFlooredPoint(gfx::ScalePoint(*hotpoint, scale));
 }
 
 void GetImageCursorBitmap(int resource_id,
@@ skipping 38 matching lines @@
     SkBitmap cropped = SkBitmapOperations::CreateTiledBitmap(
         bitmap, x_offset, 0, frame_width, frame_height);
     DCHECK_EQ(frame_width, cropped.width());
     DCHECK_EQ(frame_height, cropped.height());
 
     (*bitmaps)[frame] = cropped;
   }
 }
 
 }  // namespace ui