Added better error and OAuth support in xhr.js.

remoting/webapp/crd/js/host_list_api_impl.js

Index: remoting/webapp/crd/js/host_list_api_impl.js
diff --git a/remoting/webapp/crd/js/host_list_api_impl.js b/remoting/webapp/crd/js/host_list_api_impl.js
index 52f9377e58a12aa64aa256b4094b69d3cc5397b7..1e0a487748db4bed3ef8d7c236e58394e959cc5c 100644
--- a/remoting/webapp/crd/js/host_list_api_impl.js
+++ b/remoting/webapp/crd/js/host_list_api_impl.js
@@ -53,23 +53,19 @@ remoting.HostListApiImpl.prototype.get = function(onDone, onError) {
  */
 remoting.HostListApiImpl.prototype.put =
     function(hostId, hostName, hostPublicKey, onDone, onError) {
-  /** @param {string} token */
-  var onToken = function(token) {
-    var newHostDetails = {
+  new remoting.Xhr({
+    method: 'PUT',
+    url: remoting.settings.DIRECTORY_API_BASE_URL + '/@me/hosts/' + hostId,
+    jsonContent: {
       'data': {
         'hostId': hostId,
         'hostName': hostName,
         'publicKey': hostPublicKey
       }
-    };
-    new remoting.Xhr({
-      method: 'PUT',
-      url: remoting.settings.DIRECTORY_API_BASE_URL + '/@me/hosts/' + hostId,
-      jsonContent: newHostDetails,
-      oauthToken: token
-    }).start().then(remoting.Xhr.defaultResponse(onDone, onError));
-  };
-  remoting.identity.getToken().then(onToken, remoting.Error.handler(onError));
+    },
+    useIdentity: true,
+    ignoreErrors: []
+  }).start().then(onDone, remoting.Error.handler(onError));
 };
 
 /**
@@ -80,16 +76,12 @@ remoting.HostListApiImpl.prototype.put =
  * @param {string} hostId
  */
 remoting.HostListApiImpl.prototype.remove = function(hostId, onDone, onError) {
-  /** @param {string} token */
-  var onToken = function(token) {
-    new remoting.Xhr({
-      method: 'DELETE',
-      url: remoting.settings.DIRECTORY_API_BASE_URL + '/@me/hosts/' + hostId,
-      oauthToken: token
-    }).start().then(remoting.Xhr.defaultResponse(
-        onDone, onError, [remoting.Error.Tag.NOT_FOUND]));
-  };
-  remoting.identity.getToken().then(onToken, remoting.Error.handler(onError));
+  new remoting.Xhr({
+    method: 'DELETE',
+    url: remoting.settings.DIRECTORY_API_BASE_URL + '/@me/hosts/' + hostId,
+    useIdentity: true,
+    ignoreErrors: [remoting.Error.Tag.NOT_FOUND]
+  }).start().then(onDone, remoting.Error.handler(onError));
 };
 
 /**