wtf/Vector.h included more than necessary

Source/core/html/imports/HTMLImport.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 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 HTMLImport_h
 #define HTMLImport_h
 
 #include "core/html/imports/HTMLImportState.h"
 #include "platform/heap/Handle.h"
 #include "wtf/TreeNode.h"
-#include "wtf/Vector.h"
 
 namespace blink {
 
 class Document;
 class LocalFrame;
 class HTMLImportChild;
 class HTMLImportLoader;
 class HTMLImportsController;
 class KURL;
 
@@ skipping 90 matching lines @@
 #endif
 
 private:
     HTMLImportState m_state;
     unsigned m_sync : 1;
 };
 
 } // namespace blink
 
 #endif // HTMLImport_h