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

chrome/browser/resources/settings/people_page/camera.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/util.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-spinner/paper-spinner.html">
 <link rel="import" href="/icons.html">
 <link rel="import" href="/settings_shared_css.html">
 
 <dom-module id="settings-camera">
   <template>
     <style include="settings-shared">
       #perspectiveBox {
-        -webkit-perspective: 600px;
         height: 228px;
+        perspective: 600px;
         width: 228px;
       }
 
       #userImageStreamCrop {
         height: 228px;
         overflow: hidden;
         position: relative;
         width: 228px;
       }
 
       #userImageStreamCrop.flip-x {
-        -webkit-transform: rotateY(180deg);
+        transform: rotateY(180deg);
       }
 
       paper-spinner {
         bottom: 0;
         left: 0;
         margin: auto auto;
         position: absolute;
         right: 0;
         top: 0;
       }
@@ skipping 43 matching lines @@
         </paper-icon-button>
         <paper-icon-button id="takePhoto" tabindex="1"
             icon="settings:camera-alt" title="$i18n{takePhoto}"
             on-tap="takePhoto" disabled="[[!cameraOnline_]]">
         </paper-icon-button>
       </div>
     </div>
   </template>
   <script src="camera.js"></script>
 </dom-module>