Implement matchFamilyStyle for SkFontMgr_fontconfig

include/core/SkTypeface.h

Index: include/core/SkTypeface.h
diff --git a/include/core/SkTypeface.h b/include/core/SkTypeface.h
index 0fbf6a3e0ad337395c66f513e73eb6a37f61e8f2..19e8f2f946dd7c951921bf5c08931a0b1036b310 100644
--- a/include/core/SkTypeface.h
+++ b/include/core/SkTypeface.h
@@ -97,6 +97,7 @@ public:
      *  when they are done referencing the object. Never returns NULL.
      */
     static SkTypeface* RefDefault(Style style = SkTypeface::kNormal);
+    static SkTypeface* RefDefault(SkFontStyle style);
 
     /** Return a new reference to the typeface that most closely matches the
         requested familyName and style. Pass null as the familyName to return
@@ -108,6 +109,8 @@ public:
                 unref() when they are done.
     */
     static SkTypeface* CreateFromName(const char familyName[], Style style);
+    static SkTypeface* CreateFromName(const char familyName[],
+                                      SkFontStyle style);
 
     /** Return a new reference to the typeface that most closely matches the
         requested typeface and specified Style. Use this call if you want to
@@ -334,6 +337,7 @@ protected:
 
     friend class SkScalerContext;
     static SkTypeface* GetDefaultTypeface(Style style = SkTypeface::kNormal);
+    static SkTypeface* GetDefaultTypeface(SkFontStyle style);
 
     virtual SkScalerContext* onCreateScalerContext(const SkScalerContextEffects&,
                                                    const SkDescriptor*) const = 0;