Fix ODR violation that can break WTF::String pretty printing in tests.

Source/platform/weborigin/KURLTest.cpp

 /*
  * Copyright (C) 2010 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 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // Basic tests that verify our KURL's interface behaves the same as the
 // original KURL's.
 
 #include "config.h"
 #include "platform/weborigin/KURL.h"
 
-#include "wtf/testing/WTFTestHelpers.h"
 #include "wtf/text/CString.h"
 #include "wtf/text/WTFString.h"
 #include <gtest/gtest.h>
 
 namespace blink {
 
 struct ComponentCase {
     const char* url;
     const char* protocol;
     const char* host;
@@ skipping 648 matching lines @@
     };
 
     for (size_t i = 0; i < arraysize(referrerCases); i++) {
         KURL kurl(ParsedURLString, referrerCases[i].input);
         String referrer = kurl.strippedForUseAsReferrer();
         EXPECT_STREQ(referrerCases[i].output, referrer.utf8().data());
     }
 }
 
 } // namespace blink