SkPDF: fall back on paths for unembeddable fonts.

include/core/SkTypeface.h

Index: include/core/SkTypeface.h
diff --git a/include/core/SkTypeface.h b/include/core/SkTypeface.h
index 9eac50e03f5ebb65df038ac46176db88e150322d..825cd2e79243232b698c982999845d493087f27f 100644
--- a/include/core/SkTypeface.h
+++ b/include/core/SkTypeface.h
@@ -77,6 +77,9 @@ public:
      */
     bool isFixedPitch() const { return fIsFixedPitch; }
 
+    /** Returns true if the typeface does not set the do-not-embed bit. */
+    bool canEmbed() const;
+
     /** Return a 32bit value for this typeface, unique for the underlying font
         data. Will never return 0.
      */
@@ -375,6 +378,8 @@ protected:
 
     virtual bool onComputeBounds(SkRect*) const;
 
+    virtual bool onCanEmbed() const;
+
 private:
     friend class SkGTypeface;
     friend class SkPDFFont;