Unify geometry test printers in a test support target.

Source/platform/geometry/FloatRoundedRect.h

 /*
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * 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.
@@ skipping 15 matching lines @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef FloatRoundedRect_h
 #define FloatRoundedRect_h
 
 #include "platform/geometry/FloatRect.h"
 #include "platform/geometry/FloatSize.h"
 #include "third_party/skia/include/core/SkRRect.h"
+#include <iosfwd>
 
 namespace blink {
 
 class FloatQuad;
 
 class PLATFORM_EXPORT FloatRoundedRect {
 public:
     class PLATFORM_EXPORT Radii {
     public:
         Radii() { }
@@ skipping 150 matching lines @@
 {
     return !(a == b);
 }
 
 
 inline bool operator==(const FloatRoundedRect& a, const FloatRoundedRect& b)
 {
     return a.rect() == b.rect() && a.radii() == b.radii();
 }
 
+// Redeclared here to avoid ODR issues.
+// See platform/testing/GeometryPrinters.h.
+void PrintTo(const FloatRoundedRect&, std::ostream*);
+void PrintTo(const FloatRoundedRect::Radii&, std::ostream*);
+
 } // namespace blink
 
 #endif // FloatRoundedRect_h