Reduce webkit CSS prefixes in ui/ styles

ui/webui/resources/css/dialogs.css

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 .cr-dialog-container {
   -webkit-box-align: center;
   -webkit-box-pack: center;
-  -webkit-transition: opacity 250ms linear;
   -webkit-user-select: none;
   display: -webkit-box;
   height: 100%;
   left: 0;
   overflow: hidden;
   position: absolute;
   top: 0;
+  transition: opacity 250ms linear;
   width: 100%;
   z-index: 9999;
 }
 
 .cr-dialog-frame {
   -webkit-box-orient: vertical;
   -webkit-box-shadow: 5px 5px 5px rgba(100, 100, 100, 0.5);
   background-color: white;
   border: 1px solid rgba(0, 0, 0, 0.3);
   border-radius: 3px;
   box-shadow: 0 4px 23px 5px rgba(0, 0, 0, 0.2),
               0 2px 6px rgba(0, 0, 0, 0.15);
   cursor: default;
   display: -webkit-box;
   padding: 14px 17px;
   position: relative;
   width: 460px;
 }
 
 .cr-dialog-frame:focus {
   outline: none;
 }
 
-@-webkit-keyframes pulse {
+@keyframes pulse {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.02);
   }
  60% {
    transform: scale(1.02);
   }
  100% {
    transform: scale(1);
  }
 }
 
 .cr-dialog-frame.pulse {
-  -webkit-animation-duration: 180ms;
-  -webkit-animation-iteration-count: 1;
-  -webkit-animation-name: pulse;
-  -webkit-animation-timing-function: ease-in-out;
+  animation-duration: 180ms;
+  animation-iteration-count: 1;
+  animation-name: pulse;
+  animation-timing-function: ease-in-out;
 }
 
 .shown > .cr-dialog-frame {
+  opacity: 1;
   transform: perspective(500px) scale(1)
-                     translateY(0) rotateX(0);
-  opacity: 1;
+             translateY(0) rotateX(0);
 }
 
 .cr-dialog-frame {
+  opacity: 0;
   transform: perspective(500px) scale(0.99)
-                     translateY(-20px) rotateX(5deg);
-  -webkit-transition: all 180ms;
-  -webkit-transition-duration: 250ms;
-  opacity: 0;
+             translateY(-20px) rotateX(5deg);
+  transition: all 180ms;
+  transition-duration: 250ms;
 }
 
 .cr-dialog-shield {
-  -webkit-transition: opacity 500ms;
   background-color: white;
   bottom: 0;
   display: block;
   left: 0;
   opacity: 0;
   pointer-events: none;
   position: absolute;
   right: 0;
   top: 0;
+  transition: opacity 500ms;
 }
 
 .shown > .cr-dialog-shield {
-  -webkit-transition: opacity 500ms;
   opacity: 0.75;
+  transition: opacity 500ms;
 }
 
 [hidden] {
   display: none;
 }
 
 .cr-dialog-title {
   -webkit-margin-end: 20px;
   display: block;
   font-size: 120%;
@@ skipping 36 matching lines @@
   width: 44px;
 }
 
 .cr-dialog-close:hover {
   background-image: url(chrome://theme/IDR_CLOSE_DIALOG_H);
 }
 
 .cr-dialog-close:active {
   background-image: url(chrome://theme/IDR_CLOSE_DIALOG_P);
 }