Remove unused includes from core/{editing,fileapi,history,html}

Source/core/html/parser/HTMLTreeBuilder.h

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011 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 @@
  * (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 HTMLTreeBuilder_h
 #define HTMLTreeBuilder_h
 
 #include "core/html/parser/HTMLConstructionSite.h"
 #include "core/html/parser/HTMLElementStack.h"
 #include "core/html/parser/HTMLParserOptions.h"
-#include <wtf/Noncopyable.h>
-#include <wtf/PassOwnPtr.h>
-#include <wtf/PassRefPtr.h>
-#include <wtf/RefPtr.h>
-#include <wtf/text/StringBuilder.h>
-#include <wtf/text/TextPosition.h>
-#include <wtf/unicode/Unicode.h>
-#include <wtf/Vector.h>
+#include "wtf/Noncopyable.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefPtr.h"
+#include "wtf/Vector.h"
+#include "wtf/text/StringBuilder.h"
+#include "wtf/text/TextPosition.h"
 
 namespace WebCore {
 
 class AtomicHTMLToken;
 class Document;
 class DocumentFragment;
 class Element;
 class Frame;
 class HTMLToken;
 class HTMLDocument;
@@ skipping 180 matching lines @@
 
     RefPtr<Element> m_scriptToProcess; // <script> tag which needs processing before resuming the parser.
     TextPosition m_scriptToProcessStartPosition; // Starting line number of the script tag needing processing.
 
     HTMLParserOptions m_options;
 };
 
 }
 
 #endif