Font variations.

include/ports/SkFontMgr.h

Index: include/ports/SkFontMgr.h
diff --git a/include/ports/SkFontMgr.h b/include/ports/SkFontMgr.h
index 4dde920085cb7da8dba2e860dba7d45550aab230..48a0494a7a9d3d574ddc6f287e9a15272c46cbad 100644
--- a/include/ports/SkFontMgr.h
+++ b/include/ports/SkFontMgr.h
@@ -12,6 +12,7 @@
 #include "SkFontStyle.h"
 
 class SkData;
+class SkFontData;
 class SkStreamAsset;
 class SkString;
 class SkTypeface;
@@ -95,6 +96,14 @@ public:
     SkTypeface* createFromStream(SkStreamAsset*, int ttcIndex = 0) const;
 
     /**
+     *  Create a typeface from the specified font data.
+     *  Takes ownership of the font data, so the caller should not reference it again.
+     *  Will return NULL if the typeface could not be created.
+     *  The caller must call unref() on the returned object if it is not null.
+     */
+    SkTypeface* createFromFontData(SkFontData*) const;
+
+    /**
      *  Create a typeface for the specified fileName and TTC index
      *  (pass 0 for none) or NULL if the file is not found, or its contents are
      *  not recognized. The caller must call unref() on the returned object
@@ -129,6 +138,8 @@ protected:
 
     virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) const = 0;
     virtual SkTypeface* onCreateFromStream(SkStreamAsset*, int ttcIndex) const = 0;
+    // TODO: make pure virtual.
+    virtual SkTypeface* onCreateFromFontData(SkFontData*) const;
     virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const = 0;
 
     virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],