Reduce usage of webkit CSS prefixes in chrome/browser/resources

chrome/browser/resources/gaia_auth/offline.css

 /* Copyright 2014 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. */
 /* TODO(dbeam): what's wrong with * here? Specificity issues? */
 audio,
 body,
 canvas,
 command,
 dd,
 div,
@@ skipping 115 matching lines @@
   border: 1px solid #e5e5e5;
 }
 input[type=email][disabled=disabled]:hover,
 input[type=number][disabled=disabled]:hover,
 input[type=password][disabled=disabled]:hover,
 input[type=text][disabled=disabled]:hover,
 input[type=url][disabled=disabled]:hover {
   box-shadow: none;
 }
 .g-button {
-  -webkit-transition: all 218ms;
   -webkit-user-select: none;
   background-color: #f5f5f5;
   background-image: linear-gradient(to bottom, #f5f5f5, #f1f1f1);
   border: 1px solid rgba(0,0,0,0.1);
   border-radius: 2px;
   color: #555;
   cursor: default;
   display: inline-block;
   font-size: 11px;
   font-weight: bold;
   height: 27px;
   line-height: 27px;
   min-width: 54px;
   padding: 0 8px;
   text-align: center;
   transition: all 218ms;

[Eric Willigers, 2016/11/30 02:06:52]

"-webkit-transition: all 218ms;" was redundant.

   user-select: none;
 }
 *+html .g-button {
   min-width: 70px;
 }
 button.g-button,
 input[type=submit].g-button {
   height: 29px;
   line-height: 29px;
   margin: 0;
   vertical-align: bottom;
 }
 *+html button.g-button,
 *+html input[type=submit].g-button {
   overflow: visible;
 }
 .g-button:hover {
-  -webkit-transition: all 0ms;
   background-color: #f8f8f8;
   background-image: linear-gradient(to bottom, #f8f8f8, #f1f1f1);
   border: 1px solid #c6c6c6;
   box-shadow: 0 1px 1px rgba(0,0,0,0.1);
   color: #333;
   text-decoration: none;
   transition: all 0ms;

[Eric Willigers, 2016/11/30 02:06:52]

"-webkit-transition: all 0ms;" was redundant.

[Dan Beam, 2016/12/02 01:54:34]

arguably this should just be 0

[Eric Willigers, 2016/12/02 20:11:55]

0 without units is only for lengths.
https://developer.mozilla.org/en/docs/Web/CSS/time

 }
 .g-button:active {
   background-color: #f6f6f6;
   background-image: linear-gradient(to bottom, #f6f6f6, #f1f1f1);
   box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
 }
 .g-button:visited {
   color: #666;
 }
 .g-button-submit {
@@ skipping 85 matching lines @@
   height: 32px;
   margin: 0 1.5em 1.2em 0;
 }
 .errormsg {
   display: none;
 }
 .form-error + .errormsg,
 .field-error + .errormsg {
   display: block;
 }