Fix unused functions warnings on Linux.

Source/wtf/testing/WTFTestHelpers.h

 /*
  * Copyright (C) 2013 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 21 matching lines @@
 #define WTFTestHelpers_h
 
 #include "wtf/text/CString.h"
 #include "wtf/text/WTFString.h"
 
 #include <ostream> // NOLINT
 
 namespace WTF {
 
 // Output stream operator so gTest's macros work with WebCore strings.
-static std::ostream& operator<<(std::ostream& out, const String& str)
+inline std::ostream& operator<<(std::ostream& out, const String& str)

[Nico, 2013/10/29 23:07:44]

Why do you need this? This header defines a single function, so files including
this header can just stop doing so if they don't use this function.

[lgombos, 2013/10/30 03:37:56]

Fixed.

 {
     return str.isEmpty() ? out : out << str.utf8().data();
 }
 
 } // namespace WTF
 
 
 #endif // WTFTestHelpers_h