arc: Add Goolge Privacy Policy link to OptIn UI.

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

Index: chrome/browser/resources/chromeos/arc_support/main.css
diff --git a/chrome/browser/resources/chromeos/arc_support/main.css b/chrome/browser/resources/chromeos/arc_support/main.css
index e2226bec711a86ada746a79041da05bfdd18d7b7..4aef81c2b1948920de56ab2d0498dd69207fb1e5 100644
--- a/chrome/browser/resources/chromeos/arc_support/main.css
+++ b/chrome/browser/resources/chromeos/arc_support/main.css
@@ -34,6 +34,12 @@ webview,
   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;
 }