Reorganize some code for more accurate type checking by the closure compiler.

Author: jleyba

javascript/node/selenium-webdriver/testing/assert.js

@@ -39,5 +39,23 @@ var base = require('../_base'),
 // PUBLIC API
 
 
-/** @type {webdriver.testing.assert.} */
-module.exports = assert;
+/**
+ * Creates a new assertion.
+ * @param {*} value The value to perform an assertion on.
+ * @return {!webdriver.testing.Assertion} The new assertion.
+ */
+module.exports = function(value) {
+  return assert(value);
+};
+
+
+/**
+ * Registers a new assertion to expose from the
+ * {@link webdriver.testing.Assertion} prototype.
+ * @param {string} name The assertion name.
+ * @param {(function(new: goog.labs.testing.Matcher, *)|
+ *          {matches: function(*): boolean,
+ *           describe: function(): string})} matcherTemplate Either the
+ *     matcher constructor to use, or an object literal defining a matcher.
+ */
+module.exports.register = assert.register;