Update the appengine code to use OAuth2 and break the gdata dependency.

remoting/client/appengine/static_files/client.js

 // Copyright (c) 2010 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.
 
 // Flag to indicate whether or not to show offline hosts in the host list.
 chromoting.showOfflineHosts = true;
 
 // String to identify bad auth tokens.
 var BAD_AUTH_TOKEN = 'bad_token';
 
@@ skipping 172 matching lines @@
   hostEntry.appendChild(hostIcon);
 
   if (host.status == 'ONLINE') {
     var span = document.createElement('span');
     span.setAttribute('class', 'connect');
     var connect = document.createElement('input');
 
     connect.setAttribute('type', 'button');
     connect.setAttribute('value', 'Connect');
     connect.setAttribute('onclick', "window.open('session?hostname=" +
-        encodeURIComponent(host.hostName) + "&hostjid=" +
-        encodeURIComponent(host.jabberId) + "');");
+        encodeURIComponent(host.hostName) +
+        "&hostjid=" + encodeURIComponent(host.jabberId) +
+        "');");
     span.appendChild(connect);
 
     var connectSandboxed = document.createElement('input');
     connectSandboxed.setAttribute('type', 'button');
     connectSandboxed.setAttribute('value', 'Connect Sandboxed');
     connectSandboxed.setAttribute('onclick',
         "window.open('session?hostname=" + encodeURIComponent(host.hostName) +
         "&hostjid=" + encodeURIComponent(host.jabberId) +
+        "&http_xmpp_proxy=" + encodeURIComponent(
+            document.getElementById('http_xmpp_proxy').value) +
         "&connect_method=sandboxed');");
     span.appendChild(connectSandboxed);
 
     hostEntry.appendChild(span);
     hostIcon.setAttribute('src', 'static_files/online.png');
   } else {
     hostIcon.setAttribute('src', 'static_files/offline.png');
   }
 
   var hostName = document.createElement('p');
   hostName.setAttribute('class', 'hostindent hostname');
   hostName.appendChild(document.createTextNode(host.hostName));
   hostEntry.appendChild(hostName);
 
   var hostStatus = document.createElement('p');
   hostStatus.setAttribute('class', 'hostindent hostinfo hoststatus-' +
                           ((host.status == 'ONLINE') ? 'good' : 'bad'));
   hostStatus.appendChild(document.createTextNode(host.status));
   hostEntry.appendChild(hostStatus);
 
   var hostInfo = document.createElement('p');
   hostInfo.setAttribute('class', 'hostindent hostinfo');
   hostInfo.appendChild(document.createTextNode(host.jabberId));
   hostEntry.appendChild(hostInfo);
 
   return hostEntry;
 }
+
+function updateAuthStatus_() {
+  var oauth2_status = document.getElementById('oauth2_status');
+  if (chromoting.oauth2.isAuthenticated()) {
+    oauth2_status.innerText = 'Tokens Good';
+    oauth2_status.style.color = 'green';
+    document.getElementById('oauth2_authorize_button').style.display = 'none';
+    document.getElementById('oauth2_clear_button').style.display = 'inline';
+    populateHostList();
+  } else {
+    oauth2_status.innerText = 'No Tokens';
+    oauth2_status.style.color = 'red';
+    document.getElementById('oauth2_authorize_button').style.display = 'inline';
+    document.getElementById('oauth2_clear_button').style.display = 'none';
+  }
+}
+
+function clearOAuth2() {
+  chromoting.oauth2.clear();
+  updateAuthStatus_();
+}
+
+function authorizeOAuth2() {
+  var oauth_code_url = 'https://accounts.google.com/o/oauth2/auth?'
+      + 'client_id=' + encodeURIComponent(
+          '440925447803-d9u05st5jjm3gbe865l0jeaujqfrufrn.' +
+          'apps.googleusercontent.com')
+      + '&redirect_uri=' + window.location.origin + '/auth/oauth2_return'
+      + '&scope=' + encodeURIComponent(
+          'https://www.googleapis.com/auth/chromoting ' +
+          'https://www.googleapis.com/auth/googletalk')
+      + '&state=' + encodeURIComponent(window.location.href)
+      + '&response_type=code';
+  window.location.replace(oauth_code_url);
+}
+