[Chromoting] Enable jscompile for webapp unittests.

remoting/webapp/unittests/ipc_unittest.js

 // Copyright 2014 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.
 
 (function() {
 
 'use strict';
 
+/** @type {base.Ipc} */
 var ipc_;
 
 function pass() {
   ok(true);
   QUnit.start();
 }
 
 function fail() {
   ok(false);
   QUnit.start();
@@ skipping 36 matching lines @@
         sinon.assert.calledWith(handler, 1, false, 'string', argArray, argDict);
         pass();
     }, fail);
 });
 
 QUnit.asyncTest(
   'send() should not invoke a handler that is unregistered',
   function() {
     var handler = sinon.spy();
     ipc_.register('foo', handler);
-    ipc_.unregister('foo', handler);
+    ipc_.unregister('foo');
     base.Ipc.invoke('foo', 'hello', 'world').then(fail, function(error) {
       sinon.assert.notCalled(handler);
       QUnit.equal(error, base.Ipc.Error.UNSUPPORTED_REQUEST_TYPE);
       pass();
     });
 });
 
 QUnit.asyncTest(
   'send() should raise exceptions on unknown request types',
   function() {
@@ skipping 54 matching lines @@
       QUnit.equal(results[0], false);
       QUnit.equal(results[1], 12);
       QUnit.equal(results[2], 'string');
       QUnit.deepEqual(results[3], [1,2]);
       QUnit.deepEqual(results[4], {key1: 'value1', key2: 'value2'});
       pass();
     }, fail);
 });
 
 })();