Fix sync signed in text from being too small.

chrome/browser/resources/about_welcome_android/about_welcome_android.css

 /* Copyright (c) 2012 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. */
 
 html {
   height: 100%;
   width: 100%;
 }
 
 body {
@@ skipping 24 matching lines @@
 
 #footer-container {
   display: none;
   position: fixed;
   text-align: center;
   width: 100%;
 }
 
 #footer {
   color: #646464;
+  font-size: 1.3em;
 }
 
 #take-a-tour {
   background: -webkit-gradient(
       linear, left top, left bottom, from(#f5f5f5), to(#f1f1f1));
   border: 1px solid #ccc;
   border-radius: 2px;
   box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08),
       inset 0 0 2px rgba(255, 255, 255, 0.6);
   color: rgb(73, 73, 74);
@@ skipping 93 matching lines @@
     margin-right: auto;
   }
 }
 @media only screen and (max-width: 605px) {
   #footer {
     /* the footer horizontally fills the page, so add some margin */
     margin-left: 20px;
     margin-right: 20px;
   }
 }