ui: Make gfx::Size::Scale() mutate the class. Add gfx::ScaleSize() similar to Rect/Point.

ui/compositor/dip_util.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 "ui/compositor/dip_util.h"
 
 #include "base/command_line.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/compositor/compositor.h"
 #include "ui/compositor/compositor_switches.h"
@@ skipping 14 matching lines @@
 
 gfx::Point ConvertPointToDIP(const Layer* layer,
                              const gfx::Point& point_in_pixel) {
   return gfx::ToFlooredPoint(
       gfx::ScalePoint(point_in_pixel, 1.0f / GetDeviceScaleFactor(layer)));
 }
 
 gfx::Size ConvertSizeToDIP(const Layer* layer,
                            const gfx::Size& size_in_pixel) {
   return gfx::ToFlooredSize(
-      size_in_pixel.Scale(1.0f / GetDeviceScaleFactor(layer)));
+      gfx::ScaleSize(size_in_pixel, 1.0f / GetDeviceScaleFactor(layer)));
 }
 
 gfx::Rect ConvertRectToDIP(const Layer* layer,
                            const gfx::Rect& rect_in_pixel) {
   float scale = 1.0f / GetDeviceScaleFactor(layer);
   return gfx::ToFlooredRectDeprecated(gfx::ScaleRect(rect_in_pixel, scale));
 }
 
 gfx::Point ConvertPointToPixel(const Layer* layer,
                                const gfx::Point& point_in_dip) {
   return gfx::ToFlooredPoint(
       gfx::ScalePoint(point_in_dip, GetDeviceScaleFactor(layer)));
 }
 
 gfx::Size ConvertSizeToPixel(const Layer* layer,
                              const gfx::Size& size_in_dip) {
-  return gfx::ToFlooredSize(size_in_dip.Scale(GetDeviceScaleFactor(layer)));
+  return gfx::ToFlooredSize(
+      gfx::ScaleSize(size_in_dip, GetDeviceScaleFactor(layer)));
 }
 
 gfx::Rect ConvertRectToPixel(const Layer* layer,
                              const gfx::Rect& rect_in_dip) {
   float scale = GetDeviceScaleFactor(layer);
   return gfx::ToFlooredRectDeprecated(gfx::ScaleRect(rect_in_dip, scale));
 }
 }  // namespace ui