[Search] Adjust buttons in the first run experience.

chrome/browser/resources/contextual_search/promo.css

 /* Copyright 2014 The Chromium Authors. All rights reserved.
    Use of this source code is governed by a BSD-style license that can be
    found in the LICENSE file.
 */
 @font-face {
   font-family: 'Roboto2';
   font-weight: 400;
   src: local('Roboto'), local('Roboto2-Regular'),
       url(/roboto.woff2) format('woff2'), url(/roboto.woff) format('woff');
 }
 
 body {
   color: #414141;
   font-family: 'Roboto2', sans-serif;
   margin: 0;
 }
 
 a {
-  color: #414141;
   text-decoration: none;
 }
 
-.colored {
+a.colored-link {
   color: rgb(66, 133, 244);
 }
 
-.label {
-  display: inline-block;
-  font-size: 14px;
-  font-weight: bold;
-  padding: 28px;
-  white-space: nowrap;
-}
-
-.label a {
-  text-transform: uppercase;
-}
-
 #button-container {
   text-align: right;
   width: 100%;
 }
 
 #container.hide {
   -webkit-transform: scale(0.95);
   -webkit-transition-duration: 218ms;
   -webkit-transition-property: opacity, -webkit-transform;
   opacity: 0;
@@ skipping 10 matching lines @@
   letter-spacing: 1px;
   margin-top: 0;
   text-align: center;
 }
 
 #header-image {
   display: block;
   height: 100px;
   margin: 0 auto 24px auto;
 }
+
+.label {
+  display: inline-block;
+  font-size: 14px;
+  margin: 14px 0;
+  /* We use a slightly different top-bottom padding because Roboto has a
+     rendering bug which makes an extra padding to be rendered at the bottom of
+     text. */
+  padding: 17px 14px 13px 14px;
+  white-space: nowrap;
+}
+
+.label a {
+  text-transform: uppercase;
+}
+
+#optin-label {
+  background-clip: padding-box;
+  background-color: rgb(66, 133, 244);

[huangs, 2014/09/29 19:14:03]

Just "background" instead of "background-color"?  Note change in sorting if you
change this.

[Mathieu, 2014/09/29 19:28:29]

Done.

+  border-radius: 3px;
+  margin-right: 24px;
+}
+
+#optin-label a {
+  color: white;
+}
+
+#optout-label a {
+  color: rgb(66, 133, 244);
+}