Reduce usage of webkit prefixes in extension examples

chrome/common/extensions/docs/templates/articles/sencha_framework.html

Index: chrome/common/extensions/docs/templates/articles/sencha_framework.html
diff --git a/chrome/common/extensions/docs/templates/articles/sencha_framework.html b/chrome/common/extensions/docs/templates/articles/sencha_framework.html
index 3045560d5f250fa8dd9171d36234649f561ea568..1429aa9fc625462cf9af2fa1c42ccca9ee34fdf9 100644
--- a/chrome/common/extensions/docs/templates/articles/sencha_framework.html
+++ b/chrome/common/extensions/docs/templates/articles/sencha_framework.html
@@ -481,7 +481,7 @@ function playMedia(data) {
         mediaEl.play();
 
         //clear listeners
-        playerCt.removeEventListener( 'webkitTransitionEnd', animEnd, false );
+        playerCt.removeEventListener( 'transitionend', animEnd, false );
         animEnd = null;
     };
 
@@ -490,8 +490,8 @@ function playMedia(data) {
     mediaEl.load();
 
     //animate in player
-    playerCt.addEventListener( 'webkitTransitionEnd', animEnd, false );
-    playerCt.style.webkitTransform = "translateY(0)";
+    playerCt.addEventListener( 'transitionend', animEnd, false );
+    playerCt.style.transform = "translateY(0)";
 
     //reply postmessage
     data.result = true;