Remove windows/mac/ios specific code from //ui

ui/gfx/geometry/size.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/gfx/geometry/size.h"
 
-#if defined(OS_WIN)
-#include <windows.h>
-#endif
-
 #include "base/strings/stringprintf.h"
 
 namespace gfx {
 
-#if defined(OS_WIN)
-SIZE Size::ToSIZE() const {
-  SIZE s;
-  s.cx = width();
-  s.cy = height();
-  return s;
-}
-#endif
-
-#if defined(OS_MACOSX)
-Size& Size::operator=(const CGSize& s) {
-  set_width(s.width);
-  set_height(s.height);
-  return *this;
-}
-#endif
-
 int Size::GetArea() const {
   return width() * height();
 }
 
 void Size::Enlarge(int grow_width, int grow_height) {
   SetSize(width() + grow_width, height() + grow_height);
 }
 
 void Size::SetToMin(const Size& other) {
   width_ = width() <= other.width() ? width() : other.width();
   height_ = height() <= other.height() ? height() : other.height();
 }
 
 void Size::SetToMax(const Size& other) {
   width_ = width() >= other.width() ? width() : other.width();
   height_ = height() >= other.height() ? height() : other.height();
 }
 
 std::string Size::ToString() const {
   return base::StringPrintf("%dx%d", width(), height());
 }
 
 }  // namespace gfx