Implicit coversion operators from integer geometry types to floating point.

ui/gfx/size.h

 // 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.
 
 #ifndef UI_GFX_SIZE_H_
 #define UI_GFX_SIZE_H_
 
 #include <string>
 
 #include "build/build_config.h"
@@ skipping 25 matching lines @@
 #if defined(OS_MACOSX)
   Size& operator=(const CGSize& s);
 #endif
 
 #if defined(OS_WIN)
   SIZE ToSIZE() const;
 #elif defined(OS_MACOSX)
   CGSize ToCGSize() const;
 #endif
 
-  SizeF ToSizeF() const {
+  operator SizeF() const {
     return SizeF(width(), height());
   }
 
   SizeF Scale(float scale) const WARN_UNUSED_RESULT {
     return Scale(scale, scale);
   }
 
   SizeF Scale(float x_scale, float y_scale) const WARN_UNUSED_RESULT {
     return SizeF(width() * x_scale, height() * y_scale);
   }
 
   std::string ToString() const;
 };
 
+inline bool operator==(const Size& lhs, const Size& rhs) {
+  return lhs.width() == rhs.width() && lhs.height() == rhs.height();
+}
+
+inline bool operator!=(const Size& lhs, const Size& rhs) {
+  return !(lhs == rhs);
+}
+
 #if !defined(COMPILER_MSVC)
 extern template class SizeBase<Size, int>;
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GFX_SIZE_H_