Remove unnecessary includes of GlyphBuffer.h.

Source/platform/fonts/harfbuzz/HarfBuzzShaper.h

 /*
  * Copyright (C) 2012 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 14 matching lines @@
  * 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 HarfBuzzShaper_h
 #define HarfBuzzShaper_h
 
 #include "hb.h"
-#include "platform/fonts/GlyphBuffer.h"
 #include "platform/geometry/FloatBoxExtent.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/text/TextRun.h"
 #include "wtf/HashSet.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/unicode/CharacterNames.h"
 #include "wtf/Vector.h"
 
 #include <unicode/uscript.h>
 
 namespace WebCore {
 
 class Font;
+class GlyphBuffer;
 class SimpleFontData;
+
 class HarfBuzzShaper FINAL {
 public:
     enum ForTextEmphasisOrNot {
         NotForTextEmphasis,
         ForTextEmphasis
     };
 
     HarfBuzzShaper(const Font*, const TextRun&, ForTextEmphasisOrNot = NotForTextEmphasis);
 
     void setDrawRange(int from, int to);
@@ skipping 100 matching lines @@
 
     float m_totalWidth;
     FloatBoxExtent m_glyphBoundingBox;
 
     friend struct CachedShapingResults;
 };
 
 } // namespace WebCore
 
 #endif // HarfBuzzShaper_h