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

Source/core/platform/graphics/FontDescription.cpp

Index: Source/core/platform/graphics/FontDescription.cpp
diff --git a/Source/core/platform/graphics/FontDescription.cpp b/Source/core/platform/graphics/FontDescription.cpp
index 5b0f32cf25d09da10d78d139dc27e284e73cfdab..25ad74cb10268ce01c96fe359a8e7307c2a82c08 100644
--- a/Source/core/platform/graphics/FontDescription.cpp
+++ b/Source/core/platform/graphics/FontDescription.cpp
@@ -30,6 +30,8 @@
 #include "config.h"
 #include "core/platform/graphics/FontDescription.h"
 
+#include "FontFamilyNames.h"
+
 namespace WebCore {
 
 struct SameSizeAsFontDescription {
@@ -87,6 +89,12 @@ FontWeight FontDescription::bolderWeight(void) const
     return FontWeightNormal;
 }
 
+bool FontDescription::useFixedDefaultSize() const
+{
+    // only use fixed default size when there is only one font family, and that family is "monospace"
+    return genericFamily() == MonospaceFamily && !family().next() && family().family() == FontFamilyNames::monospaceFamily;
+}
+
 FontTraitsMask FontDescription::traitsMask() const
 {
     return static_cast<FontTraitsMask>((m_italic ? FontStyleItalicMask : FontStyleNormalMask)