DevTools: Run workspace mapping tip infobar animation only once

Source/devtools/front_end/ui/UIUtils.js

Index: Source/devtools/front_end/ui/UIUtils.js
diff --git a/Source/devtools/front_end/ui/UIUtils.js b/Source/devtools/front_end/ui/UIUtils.js
index 1ed047d6685ddff5b79b7cf9d2c80a180b0d3e30..9cd3db0da0672c15c2d057ab35f53d4b00c3e2bc 100644
--- a/Source/devtools/front_end/ui/UIUtils.js
+++ b/Source/devtools/front_end/ui/UIUtils.js
@@ -730,13 +730,13 @@ WebInspector.runCSSAnimationOnce = function(element, className)
     function animationEndCallback()
     {
         element.classList.remove(className);
-        element.removeEventListener("animationend", animationEndCallback, false);
+        element.removeEventListener("webkitAnimationEnd", animationEndCallback, false);
     }
 
     if (element.classList.contains(className))
         element.classList.remove(className);
 
-    element.addEventListener("animationend", animationEndCallback, false);
+    element.addEventListener("webkitAnimationEnd", animationEndCallback, false);
     element.classList.add(className);
 }