add JSONP option to output of skpdiff

experimental/skpdiff/SkDiffContext.h

Index: experimental/skpdiff/SkDiffContext.h
diff --git a/experimental/skpdiff/SkDiffContext.h b/experimental/skpdiff/SkDiffContext.h
index 545b51512380a02b1fa62dba2f86cc66d4f8d836..141da09a4d935f6165c79f88a48b5a5d84ab1f58 100644
--- a/experimental/skpdiff/SkDiffContext.h
+++ b/experimental/skpdiff/SkDiffContext.h
@@ -85,9 +85,10 @@ public:
      *     ]
      * }
      *
-     * @param stream The stream to output the diff to
+     * @param stream   The stream to output the diff to
+     * @param useJSONP True to adding padding to the JSON output to make it cross-site requestable.
      */
-    void outputRecords(SkWStream& stream);
+    void outputRecords(SkWStream& stream, bool useJSONP);
 
 private:
     struct DiffData {