Make platform/text to use USING_FAST_MALLOC.

third_party/WebKit/Source/platform/text/StringTruncator.h

 /*
  * Copyright (C) 2005, 2006, 2007 Apple 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:
  *
  * 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 12 matching lines @@
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef StringTruncator_h
 #define StringTruncator_h
 
 #include "platform/PlatformExport.h"
+#include "wtf/Allocator.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class Font;
 
 class PLATFORM_EXPORT StringTruncator {
+    STATIC_ONLY(StringTruncator);
 public:
     static String centerTruncate(const String&, float maxWidth, const Font&);
     static String rightTruncate(const String&, float maxWidth, const Font&);
     static float width(const String&, const Font&);
 };
 
 } // namespace blink
 
 #endif // !defined(StringTruncator_h)