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

chrome/browser/resources/options/browser_options.css

Index: chrome/browser/resources/options/browser_options.css
diff --git a/chrome/browser/resources/options/browser_options.css b/chrome/browser/resources/options/browser_options.css
index c0c4b1985dd58d6e6631c2489bd1139f39c8c157..cb9a251073b9aa765c2c86d17c58959c6bd2dd25 100644
--- a/chrome/browser/resources/options/browser_options.css
+++ b/chrome/browser/resources/options/browser_options.css
@@ -235,7 +235,7 @@ list:not([disabled]) > .network-group[selected] {
   width: 100%;
 }
 
-@-webkit-keyframes connecting-animation {
+@keyframes connecting-animation {
   0% {
     background-position: 0 25%;
   }
@@ -271,11 +271,11 @@ list:not([disabled]) > .network-group[selected] {
 
 .network-options-button {
   -webkit-box-flex: 0;
-  -webkit-transform: scale(0.6);
   background-image: none;
   background-position: center center;
   display: block;
   opacity: 0.5;
+  transform: scale(0.6);
   vertical-align: middle;
   width: 19px;
 }
@@ -289,7 +289,7 @@ list:not([disabled]) > .network-group[selected] {
   opacity: 1;
 }
 
-@-webkit-keyframes vpn-connecting-animation {
+@keyframes vpn-connecting-animation {
   from {
     opacity: 1;
   }
@@ -299,11 +299,11 @@ list:not([disabled]) > .network-group[selected] {
 }
 
 .network-connecting {
-  -webkit-animation: connecting-animation 1s step-end infinite;
+  animation: connecting-animation 1s step-end infinite;
 }
 
 .network-vpn.network-connecting {
-  -webkit-animation: vpn-connecting-animation 500ms alternate infinite;
+  animation: vpn-connecting-animation 500ms alternate infinite;
 }
 
 .network-title {
@@ -422,8 +422,8 @@ list:not([disabled]) > .network-group[selected] {
 }
 
 .sliding {
-  -webkit-transition: height 200ms;
   overflow-y: hidden;
+  transition: height 200ms;
 }
 
 #keyboard-overlay .option-value > select {