arc: Add Goolge Privacy Policy link to OptIn UI.

chrome/browser/resources/chromeos/arc_support/main.css

 /* Copyright 2016 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,
 body,
 webview,
 .section {
   font-family: 'Roboto';
   height: 100%;
@@ skipping 16 matching lines @@
 ::-webkit-scrollbar-thumb:hover {
   background: rgba(0, 0, 0, 0.2);
 }
 
 #arc-support {
   flex: auto;
   overflow: hidden;
   width: 960px;
 }
 
+#privacy-policy-link {
+  margin: 0;
+  padding: 0;
+  text-align: left;

[xiyuan, 2016/10/19 16:17:51]

Consider removing this and putting #privacy-policy-link in a block element (e.g.
<div>) with "flex" class.

[khmel, 2016/10/19 16:33:30]

I removed it. It is not required in either case. Also commented about div in
html file.

+}
+
 #terms-view {
   width: 640px;
 }
 
 .bubble-button > div {
   height: 12px;
   top: -8px;
   width: 12px;
 }
 
@@ skipping 156 matching lines @@
 
 a:link {
   color: rgb(51, 103, 214);
   text-decoration: none;
 }
 
 a:visited {
   color: rgb(51, 103, 214);
   text-decoration: none;
 }