Add privacy policy to demos that use storage

demos/code/index.html

@@ -27,6 +27,7 @@
       </td>
       <td class="farSide">
         <select id="languageMenu"></select>
+        <a class="privacyLink" href="https://policies.google.com/privacy">Privacy</a>
       </td>
     </tr>
     <tr>

demos/code/style.css

@@ -174,3 +174,10 @@ button {
     display: table-cell;
   }
 }
+
+/* Privacy link */
+.privacyLink {
+  font-family: Roboto, Arial, Helvetica, sans-serif;
+  font-size: small;
+  text-decoration: none;
+}