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 a20bc2431816e83f00d94789277bb0e895ae7cbf..3d9a909906f7ae806950d6a57f8d422ff9044c3c 100644
--- a/ui/webui/resources/css/dialogs.css
+++ b/ui/webui/resources/css/dialogs.css
@@ -5,13 +5,13 @@
 .cr-dialog-container {
   -webkit-box-align: center;
   -webkit-box-pack: center;
-  -webkit-transition: opacity 250ms linear;
   display: -webkit-box;
   height: 100%;
   left: 0;
   overflow: hidden;
   position: absolute;
   top: 0;
+  transition: opacity 250ms linear;
   user-select: none;
   width: 100%;
   z-index: 9999;
@@ -36,7 +36,7 @@
   outline: none;
 }
 
-@-webkit-keyframes pulse {
+@keyframes pulse {
  0% {
    transform: scale(1);
  }
@@ -52,28 +52,27 @@
 }
 
 .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 {
-  transform: perspective(500px) scale(1)
-                     translateY(0) rotateX(0);
   opacity: 1;
+  transform: perspective(500px) scale(1)
+             translateY(0) rotateX(0);
 }
 
 .cr-dialog-frame {
-  transform: perspective(500px) scale(0.99)
-                     translateY(-20px) rotateX(5deg);
-  -webkit-transition: all 180ms;
-  -webkit-transition-duration: 250ms;
   opacity: 0;
+  transform: perspective(500px) scale(0.99)
+             translateY(-20px) rotateX(5deg);
+  transition: all 180ms;
+  transition-duration: 250ms;
 }
 
 .cr-dialog-shield {
-  -webkit-transition: opacity 500ms;
   background-color: white;
   bottom: 0;
   display: block;
@@ -83,11 +82,12 @@
   position: absolute;
   right: 0;
   top: 0;
+  transition: opacity 500ms;
 }
 
 .shown > .cr-dialog-shield {
-  -webkit-transition: opacity 500ms;
   opacity: 0.75;
+  transition: opacity 500ms;
 }
 
 [hidden] {