Replace -webkit-transform with transform in Chrome UI

ui/webui/resources/css/overlay.css

Index: ui/webui/resources/css/overlay.css
diff --git a/ui/webui/resources/css/overlay.css b/ui/webui/resources/css/overlay.css
index 361fb8218ad6a2435ed4587e1b812459cfeea3a5..3b3340d26de7cf333f8ee5d2abfc47b62ea5d8d6 100644
--- a/ui/webui/resources/css/overlay.css
+++ b/ui/webui/resources/css/overlay.css
@@ -25,14 +25,14 @@
 .overlay.transparent .page {
   /* TODO(flackr): Add perspective(500px) rotateX(5deg) when accelerated
    * compositing is enabled on chrome:// pages. See http://crbug.com/116800. */
-  -webkit-transform: scale(0.99) translateY(-20px);
+  transform: scale(0.99) translateY(-20px);
 }
 
 /* The foreground dialog. */
 .overlay .page {
   -webkit-border-radius: 3px;
   -webkit-box-orient: vertical;
-  -webkit-transition: 200ms -webkit-transform;
+  -webkit-transition: 200ms transform;
   background: white;
   box-shadow: 0 4px 23px 5px rgba(0, 0, 0, 0.2), 0 2px 6px rgba(0,0,0,0.15);
   color: #333;
@@ -52,16 +52,16 @@
 /* keyframes used to pulse the overlay */
 @-webkit-keyframes pulse {
  0% {
-   -webkit-transform: scale(1);
+   transform: scale(1);
  }
  40% {
-   -webkit-transform: scale(1.02);
+   transform: scale(1.02);
   }
  60% {
-   -webkit-transform: scale(1.02);
+   transform: scale(1.02);
   }
  100% {
-   -webkit-transform: scale(1);
+   transform: scale(1);
  }
 }