Updated XHR API so call sites are more descriptive.

remoting/webapp/js_proto/qunit_proto.js

 // Copyright 2015 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.
 
 // This file contains various hacks needed to inform JSCompiler of various
 // QUnit-specific properties and methods. It is used only with JSCompiler to
 // verify the type-correctness of our code.
 
 
 /** @type {Object} */
 var QUnit = QUnit || {};
 
 /** @constructor */
 QUnit.Test = function() {};
 
 /** @type {QUnit.Clock} */
 QUnit.Test.prototype.clock = new QUnit.Clock();
 
 /** @constructor */
 QUnit.Clock = function() {};
 
 /** @param {number} ticks */
 QUnit.Clock.prototype.tick = function(ticks) {};
 
 
 /**
  * @param {string} desc
  * @param {Function} f
+ * @deprecated
  */
 QUnit.asyncTest = function(desc, f) {};
 
 /**
  * @param {*} a
  * @param {*} b
  * @param {string=} opt_message
  */
 QUnit.deepEqual = function(a, b, opt_message) {};
 
@@ skipping 11 matching lines @@
 
 /**
  * @param {string} desc
  * @param {Object=} dict
  */
 QUnit.module = function(desc, dict) {};
 
 /**
  * @param {*} a
  * @param {*} b
- * @param {string} desc
+ * @param {string=} opt_desc
  */
-QUnit.notEqual = function(a, b, desc) {};
+QUnit.notEqual = function(a, b, opt_desc) {};
 
 /**
  * @param {boolean} cond
  * @param {string=} desc
  * @return {boolean}
  */
 QUnit.ok = function(cond, desc) {};
 
 QUnit.start = function() {};
 
 /**
  * @param {string} desc
- * @param {Function} f
+ * @param {function(!QUnit.Assert)} f
  */
 QUnit.test = function(desc, f) {};
 
 /** @param {Function} f */
 QUnit.testStart = function(f) {};
 
+/**
+ * @constructor
+ */
+QUnit.Assert = function() {};
 
+/**
+ * @return {function():void}
+ */
+QUnit.Assert.prototype.async  = function() {};
+
+// TODO(jrw): Make these the primary definitions.
+QUnit.Assert.prototype.deepEqual = QUnit.deepEqual;
+QUnit.Assert.prototype.equal = QUnit.equal;
+QUnit.Assert.prototype.notEqual = QUnit.notEqual;
+QUnit.Assert.prototype.ok = QUnit.ok;
+
+/**
+ * @const {!QUnit.Assert}
+ */
+QUnit.assert;
+
+// TODO(jrw): Mark these as deprecated.
 var deepEqual = QUnit.deepEqual;
 var equal = QUnit.equal;
 var expect = QUnit.expect;
 var module = QUnit.module;
 var notEqual = QUnit.notEqual;
 var ok = QUnit.ok;
 var test = QUnit.test;