Convert Chromoting plugin logging to appear in client UI

remoting/client/appengine/static_files/chromoting_session.js

 // Copyright (c) 2011 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.
 
 // Maximum numer of lines to record in the debug log.
 // Only the most recent <n> lines are displayed.
 var MAX_DEBUG_LOG_SIZE = 1000;
 
 // Message id so that we can identify (and ignore) message fade operations for
 // old messages.  This starts at 1 and is incremented for each new message.
 chromoting.messageId = 1;
 
 chromoting.scaleToFit = false;
 
 // Default to trying to sandboxed connections.
 chromoting.connectMethod = 'sandboxed';
 
 // This executes a poll loop on the server for more Iq packets, and feeds them
 // to the plugin.
 function feedIq() {
   var xhr = new XMLHttpRequest();
+  addToDebugLog("xmpp proxy: " + chromoting.httpXmppProxy);
   xhr.open("GET", chromoting.httpXmppProxy + '/readIq?host_jid=' +
            encodeURIComponent(document.hostjid), true);
   xhr.withCredentials = true;
   xhr.onreadystatechange = function() {
     if (xhr.readyState == 4) {
       if (xhr.status == 200) {
         addToDebugLog('Receiving Iq: --' + xhr.responseText + '--');
         chromoting.plugin.onIq(xhr.responseText);
       }
       if (xhr.status == 200 || xhr.status == 204) {
         window.setTimeout(feedIq, 0);
       } else {
         addToDebugLog("HttpXmpp gateway returned code: " + xhr.status);
         chromoting.plugin.disconnect();
         setClientStateMessage("Failed");
       }
     }
   }
   xhr.send(null);
 }
 
 function registerConnection() {
   var xhr = new XMLHttpRequest();
+  addToDebugLog("xmpp proxy: " + chromoting.httpXmppProxy);
   xhr.open("POST", chromoting.httpXmppProxy + '/newConnection', true);
   xhr.withCredentials = true;
   xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
   xhr.onreadystatechange = function() {
     if (xhr.readyState == 4) {
       if (xhr.status == 200) {
         addToDebugLog('Receiving Iq: --' + xhr.responseText + '--');
         var clientjid = xhr.responseText;
 
         chromoting.plugin.sendIq = sendIq;
@@ skipping 284 matching lines @@
   setClientStateMessage(
       "Video stats: bandwidth: " + videoBandwidth.toFixed(2) + "Kbps" +
       ", Latency: capture: " + videoCaptureLatency.toFixed(2) + "ms" +
       ", encode: " + videoEncodeLatency.toFixed(2) + "ms" +
       ", decode: " + videoDecodeLatency.toFixed(2) + "ms" +
       ", render: " + videoRenderLatency.toFixed(2) + "ms");
 
   // Update the stats once per second.
   window.setTimeout("updateStatusBarStats()", 1000);
 }