Reduce webkit CSS prefixes in ui/ styles

ui/webui/resources/css/dialogs.css

Index: ui/webui/resources/css/dialogs.css
diff --git a/ui/webui/resources/css/dialogs.css b/ui/webui/resources/css/dialogs.css
index fde32aab91e4d08809f4ce145b756b64a307e6b1..568f93e6dd7cd6b3aee8547396bcca6855c0e212 100644
--- a/ui/webui/resources/css/dialogs.css
+++ b/ui/webui/resources/css/dialogs.css
@@ -5,7 +5,7 @@
 .cr-dialog-container {
   -webkit-box-align: center;
   -webkit-box-pack: center;
-  -webkit-transition: opacity 250ms linear;
+  transition: opacity 250ms linear;
   -webkit-user-select: none;
   display: -webkit-box;
   height: 100%;
@@ -36,7 +36,7 @@
   outline: none;
 }
 
-@-webkit-keyframes pulse {
+@keyframes pulse {
  0% {
    transform: scale(1);
  }
@@ -52,10 +52,10 @@
 }
 
 .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 {
@@ -67,13 +67,13 @@
 .cr-dialog-frame {
   transform: perspective(500px) scale(0.99)
                      translateY(-20px) rotateX(5deg);
-  -webkit-transition: all 180ms;
-  -webkit-transition-duration: 250ms;
+  transition: all 180ms;
+  transition-duration: 250ms;
   opacity: 0;
 }
 
 .cr-dialog-shield {
-  -webkit-transition: opacity 500ms;
+  transition: opacity 500ms;
   background-color: white;
   bottom: 0;
   display: block;
@@ -86,7 +86,7 @@
 }
 
 .shown > .cr-dialog-shield {
-  -webkit-transition: opacity 500ms;
+  transition: opacity 500ms;
   opacity: 0.75;
 }