Implicit coversion operators from integer geometry types to floating point.

ui/gfx/size_f.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_F_H_
 #define UI_GFX_SIZE_F_H_
 
 #include <string>
 
 #include "ui/base/ui_export.h"
@@ skipping 12 matching lines @@
     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 SizeF& lhs, const SizeF& rhs) {
+  return lhs.width() == rhs.width() && lhs.height() == rhs.height();
+}
+
+inline bool operator!=(const SizeF& lhs, const SizeF& rhs) {
+  return !(lhs == rhs);
+}
+
 #if !defined(COMPILER_MSVC)
 extern template class SizeBase<SizeF, float>;
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GFX_SIZE_F_H_