From 4b7999cd1decafa61ba63f4cb5537d4226776c83 Mon Sep 17 00:00:00 2001
From: Erik Arvidsson <arv@chromium.org>
Date: Wed, 2 Jul 2014 14:30:58 -0400
Subject: [PATCH] Only add setDragImage if the browser supports it

Fixes #464
---
 src/wrappers/DataTransfer.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/wrappers/DataTransfer.js b/src/wrappers/DataTransfer.js
index 84d6ad2..ce60e67 100644
--- a/src/wrappers/DataTransfer.js
+++ b/src/wrappers/DataTransfer.js
@@ -17,8 +17,10 @@
   var OriginalDataTransferSetDragImage =
       OriginalDataTransfer.prototype.setDragImage;
 
-  OriginalDataTransfer.prototype.setDragImage = function(image, x, y) {
-    OriginalDataTransferSetDragImage.call(this, unwrap(image), x, y);
-  };
+  if (OriginalDataTransferSetDragImage) {
+    OriginalDataTransfer.prototype.setDragImage = function(image, x, y) {
+      OriginalDataTransferSetDragImage.call(this, unwrap(image), x, y);
+    };
+  }
 
 })(window.ShadowDOMPolyfill);