Clean-up: Change chrome/browser's CSS time units from s to ms.

chrome/browser/resources/options/options_page.css

Index: chrome/browser/resources/options/options_page.css
diff --git a/chrome/browser/resources/options/options_page.css b/chrome/browser/resources/options/options_page.css
index dda118617f130b16b85f01b944d59c4aba556482..ce77fb60dbc2e14abc1aeeca6b32a62444301d96 100644
--- a/chrome/browser/resources/options/options_page.css
+++ b/chrome/browser/resources/options/options_page.css
@@ -63,7 +63,7 @@ body {
   -webkit-box-align: center;
   -webkit-box-orient: vertical;
   -webkit-box-pack: center;
-  -webkit-transition: 0.25s opacity;
+  -webkit-transition: 250ms opacity;
   background: -webkit-radial-gradient(rgba(127, 127, 127, 0.5),
                                       rgba(127, 127, 127, 0.5) 35%,
                                       rgba(0, 0, 0, 0.7));
@@ -179,7 +179,7 @@ html[dir='rtl'] .action-area {
 }
 
 #subpage-backdrop {
-  -webkit-transition: 0.25s opacity;
+  -webkit-transition: 250ms opacity;
   background-color: rgba(233, 238, 242, .5);
   height: 100%;
   left: 216px;
@@ -190,7 +190,7 @@ html[dir='rtl'] .action-area {
 }
 
 .subpage-sheet-container {
-  -webkit-transition: 0.25s opacity, 0.1s padding-left, 0.1s padding-right;
+  -webkit-transition: 250ms opacity, 100ms padding-left, 100ms padding-right;
   box-sizing: border-box;
   min-height: 100%;
   position: absolute;
@@ -350,7 +350,7 @@ section > h3 + * > *:first-child {
 
 list > * {
   -webkit-box-align: center;
-  -webkit-transition: .15s background-color;
+  -webkit-transition: 150ms background-color;
   box-sizing: border-box;
   border-radius: 0;
   display: -webkit-box;
@@ -427,7 +427,7 @@ list .deletable-item > :first-child {
 }
 
 list .close-button {
-  -webkit-transition: .15s opacity;
+  -webkit-transition: 150ms opacity;
   background-color: transparent;
   /* TODO(stuartmorgan): Replace with real images once they are available. */
   background-image: url("../../../app/theme/close_bar.png");