Switch from PrintTo to operator<< for platform printers

third_party/WebKit/Source/platform/geometry/LayoutSize.h

 /*
  * Copyright (c) 2012, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 212 matching lines @@
 inline IntSize roundedIntSize(const LayoutSize& s)
 {
     return IntSize(s.width().round(), s.height().round());
 }
 
 inline LayoutSize roundedLayoutSize(const FloatSize& s)
 {
     return LayoutSize(s);
 }
 
-// Redeclared here to avoid ODR issues.
-// See platform/testing/GeometryPrinters.h.
-void PrintTo(const LayoutSize&, std::ostream*);
+PLATFORM_EXPORT std::ostream& operator<<(std::ostream&, const LayoutSize&);
 
 } // namespace blink
 
 #endif // LayoutSize_h