Remove inclusion of RetainPtr.h in SimpleFontData.h

Source/platform/fonts/SimpleFontData.h

 /*
  * This file is part of the internal font implementation.
  *
  * Copyright (C) 2006, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2007-2008 Torch Mobile, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 21 matching lines @@
 #include "platform/fonts/FontPlatformData.h"
 #include "platform/fonts/GlyphMetricsMap.h"
 #include "platform/fonts/GlyphPageTreeNode.h"
 #include "platform/fonts/TypesettingFeatures.h"
 #include "platform/fonts/opentype/OpenTypeVerticalData.h"
 #include "platform/geometry/FloatRect.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/text/StringHash.h"
 
-#if OS(MACOSX)
-#include "wtf/RetainPtr.h"
-#endif
-
 namespace blink {
 
 class FontDescription;
 
 enum FontDataVariant { AutoVariant, NormalVariant, SmallCapsVariant, EmphasisMarkVariant };
 
 class PLATFORM_EXPORT SimpleFontData : public FontData {
 public:
     // Used to create platform fonts.
     static PassRefPtr<SimpleFontData> create(const FontPlatformData& platformData, PassRefPtr<CustomFontData> customData = nullptr, bool isTextOrientationFallback = false)
@@ skipping 163 matching lines @@
     width = platformWidthForGlyph(glyph);
 
     m_glyphToWidthMap.setMetricsForGlyph(glyph, width);
     return width;
 }
 
 DEFINE_FONT_DATA_TYPE_CASTS(SimpleFontData, false);
 
 } // namespace blink
 #endif // SimpleFontData_h