Reduce webkit CSS prefixes in ui/ styles

ui/login/oobe.css

Index: ui/login/oobe.css
diff --git a/ui/login/oobe.css b/ui/login/oobe.css
index 809f2e80e30ab47a0eacc297b6b3d5f7483e93bf..cd545953dc009df64c489b62ebf0e56a369c4632 100644
--- a/ui/login/oobe.css
+++ b/ui/login/oobe.css
@@ -36,7 +36,7 @@ button {
 /* Do not apply this style to restricted button state. */
 button.custom-appearance:not(.button-restricted):not(.button-fancy):not(
     [is="gaia-icon-button"]) {
-  -webkit-transition: border-color 200ms;
+  transition: border-color 200ms;

[Dan Beam, 2016/11/29 06:17:12]

alpha

[Eric Willigers, 2016/11/30 04:04:56]

Done.

   border: 1px solid transparent;
   /* Don't grey out disabled buttons. */
   color: buttontext !important;
@@ -135,7 +135,7 @@ button.button-red:active {
 }
 
 #bubble {
-  -webkit-transition: 250ms opacity;
+  transition: 250ms opacity;
 }
 
 span.bold {
@@ -143,7 +143,7 @@ span.bold {
 }
 
 #version-labels {
-  -webkit-transition: all 500ms linear;
+  transition: all 500ms linear;

[Dan Beam, 2016/11/29 06:17:12]

alpha

[Eric Willigers, 2016/11/30 04:04:56]

Done.

   color: #fff;
   font-size: 11px;
   margin: 10px;
@@ -155,7 +155,7 @@ span.bold {
 }
 
 #background {
-  -webkit-transition: 700ms opacity;
+  transition: 700ms opacity;

[Dan Beam, 2016/11/29 06:17:12]

alpha

[Eric Willigers, 2016/11/30 04:04:56]

Done.

   background-size: 100% 100%;
   height: 100%;
   left: 0;