wtf/Vector.h included more than necessary

Source/web/CompositionUnderlineBuilder.h

 /*
  * 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.
  */
 
 #ifndef CompositionUnderlineBuilder_h
 #define CompositionUnderlineBuilder_h
 
 #include "core/editing/CompositionUnderline.h"
 #include "public/platform/WebVector.h"
 #include "public/web/WebCompositionUnderline.h"
-#include "wtf/Vector.h"
 
 namespace blink {
 
 // This class is used for converting from WebCompositionUnderline to
 // blink::CompositionUnderline.
 
 class CompositionUnderlineBuilder : public blink::CompositionUnderline {
 public:
     CompositionUnderlineBuilder(const WebCompositionUnderline& u)
         : blink::CompositionUnderline(u.startOffset, u.endOffset,
             blink::Color(u.color), u.thick,
             blink::Color(u.backgroundColor)) { }
 };
 
 } // namespace blink
 
 #endif