webui: make 0 into 0ms when it's a <time>.

ui/file_manager/file_manager/foreground/css/drive_welcome.css

Index: ui/file_manager/file_manager/foreground/css/drive_welcome.css
diff --git a/ui/file_manager/file_manager/foreground/css/drive_welcome.css b/ui/file_manager/file_manager/foreground/css/drive_welcome.css
index 900185b10ba7a691db586f2a222c255c11254e76..22a49d0947da4106ad8960ebc1e8a55c809cd58c 100644
--- a/ui/file_manager/file_manager/foreground/css/drive_welcome.css
+++ b/ui/file_manager/file_manager/foreground/css/drive_welcome.css
@@ -44,7 +44,7 @@
   border-color: #C6C6C6;
   box-shadow: 0 1px 1px rgba(0,0,0,0.1);
   color: #222;
-  transition: all 0;
+  transition: all 0ms;
 }
 
 .drive-welcome-button:active {
@@ -74,7 +74,7 @@
   height: 100px;
   overflow: hidden;
   position: relative;
-  transition: height 180ms ease, visibility 0 linear 180ms;

[Dan Beam, 2015/02/04 18:09:27]

unsure about this one

[arv (Not doing code reviews), 2015/02/04 20:37:37]

From the spec:

Note that order is important within the items in this property: the first value
that can be parsed as a time is assigned to the transition-duration, and the
second value that can be parsed as a time is assigned to transition-delay.

So your change looks right to me

+  transition: height 180ms ease, visibility 0ms linear 180ms;
 }
 
 .dialog-container:not([drive-welcome='header']) .drive-welcome.header {