Miscellaneous cleanup to reduce number of includes in platform/graphics/

Source/core/platform/graphics/FontDescription.h

Index: Source/core/platform/graphics/FontDescription.h
diff --git a/Source/core/platform/graphics/FontDescription.h b/Source/core/platform/graphics/FontDescription.h
index 304d1829c46847ea3c39e22d93ed159b582cdb4a..227c5b1a6f9a0ab6312370d933353b2a4a7954f9 100644
--- a/Source/core/platform/graphics/FontDescription.h
+++ b/Source/core/platform/graphics/FontDescription.h
@@ -25,7 +25,6 @@
 #ifndef FontDescription_h
 #define FontDescription_h
 
-#include "FontFamilyNames.h"
 #include "core/platform/graphics/FontFamily.h"
 #include "core/platform/graphics/FontFeatureSettings.h"
 #include "core/platform/graphics/FontOrientation.h"
@@ -41,8 +40,6 @@
 
 namespace WebCore {
 
-using namespace FontFamilyNames;
-
 enum FontWeight {
     FontWeight100,
     FontWeight200,
@@ -117,8 +114,7 @@ public:
     FontWeight bolderWeight() const;
     GenericFamilyType genericFamily() const { return static_cast<GenericFamilyType>(m_genericFamily); }
     bool usePrinterFont() const { return m_usePrinterFont; }
-    // only use fixed default size when there is only one font family, and that family is "monospace"
-    bool useFixedDefaultSize() const { return genericFamily() == MonospaceFamily && !family().next() && family().family() == monospaceFamily; }
+    bool useFixedDefaultSize() const;
     FontRenderingMode renderingMode() const { return static_cast<FontRenderingMode>(m_renderingMode); }
     Kerning kerning() const { return static_cast<Kerning>(m_kerning); }
     LigaturesState commonLigaturesState() const { return static_cast<LigaturesState>(m_commonLigaturesState); }