Expose SkPathRef::unique through SkPath.

include/core/SkPath.h

Index: include/core/SkPath.h
diff --git a/include/core/SkPath.h b/include/core/SkPath.h
index c4606cf9eae4beaaadcf69fe6001236d14cca359..cc6c38d5357ba7c510eaac5424d62071a8ed593b 100644
--- a/include/core/SkPath.h
+++ b/include/core/SkPath.h
@@ -42,6 +42,10 @@ public:
         return !(a == b);
     }
 
+    /** May return true if the caller is the only owner.

[reed1, 2015/02/12 19:47:48]

"May" ? That is mysteriously noncommittal.

/** Retruns true if the caller is the only owner of the underlying path data.
*/

+     */
+    bool unique() const { return fPathRef->unique(); }
+
     enum FillType {
         /** Specifies that "inside" is computed by a non-zero sum of signed
             edge crossings