Remove unused includes from core/platform .cpp files

Source/core/platform/graphics/skia/GlyphPageTreeNodeSkia.cpp

 /*
  * Copyright (c) 2008, 2009 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 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.
  */
 
 #include "config.h"
 #include "core/platform/graphics/GlyphPageTreeNode.h"
 
-#include "core/platform/graphics/Font.h"
 #include "core/platform/graphics/SimpleFontData.h"
 
 #include "SkPaint.h"
 #include "SkTemplates.h"
 #include "SkUtils.h"
 
 namespace WebCore {
 
 bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
 {
@@ skipping 18 matching lines @@
     unsigned allGlyphs = 0; // track if any of the glyphIDs are non-zero
     for (unsigned i = 0; i < length; i++) {
         setGlyphDataForIndex(offset + i, glyphs[i], glyphs[i] ? fontData : NULL);
         allGlyphs |= glyphs[i];
     }
 
     return allGlyphs != 0;
 }
 
 }  // namespace WebCore