Switch from PrintTo to operator<< for platform printers

third_party/WebKit/Source/platform/transforms/AffineTransform.h

 /*
  * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.
  *               2010 Dirk Schulze <krit@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 180 matching lines @@
 private:
     void setMatrix(const Transform m)
     {
         if (m && m != m_transform)
             memcpy(m_transform, m, sizeof(Transform));
     }
 
     Transform m_transform;
 };
 
-// Redeclared here to avoid ODR issues.
-// See platform/testing/TransformPrinters.h.
-void PrintTo(const AffineTransform&, std::ostream*);
+PLATFORM_EXPORT std::ostream& operator<<(std::ostream&, const AffineTransform&);
 
 } // namespace blink
 
 #endif