[Chromoting] Let the webapp detect new clipboard text items when it gets focus.

remoting/webapp/main.html

Index: remoting/webapp/main.html
diff --git a/remoting/webapp/main.html b/remoting/webapp/main.html
index d3dd79115d67755780d60ca53d22e11a366c609a..153fef3a6f647e7cd97f0c0b4d23b0e56a2b5dfd 100644
--- a/remoting/webapp/main.html
+++ b/remoting/webapp/main.html
@@ -20,6 +20,7 @@ found in the LICENSE file.
     <script src="client_plugin_v1.js"></script>
     <script src="client_screen.js"></script>
     <script src="client_session.js"></script>
+    <script src="clipboard.js"></script>
     <script src="connection_history.js"></script>
     <script src="connection_stats.js"></script>
     <script src="daemon_plugin.js"></script>