goog.base is not compatible in es5 strict mode.

A replacement is available in the form of a base method
added to constructors by goog.inherit.
This change is a no-op, but will allow dependents of
these classes to move to ES5 Strict Mode.
On behalf of Google engineers.

Author: sevaseva

Diff for: javascript/webdriver/testing/asserts.js

@@ -376,7 +376,7 @@ webdriver.testing.Assertion.prototype.isFalse = function() {
  * @extends {webdriver.testing.Assertion}
  */
 webdriver.testing.NegatedAssertion = function(value) {
-  goog.base(this, value);
+  webdriver.testing.NegatedAssertion.base(this, 'constructor', value);
   this.value = value;
 };
 goog.inherits(
@@ -387,11 +387,10 @@ goog.inherits(
 webdriver.testing.NegatedAssertion.prototype.apply = function(
     matcher, opt_message) {
   matcher = new goog.labs.testing.IsNotMatcher(matcher);
-  return goog.base(this, 'apply', matcher, opt_message);
+  return webdriver.testing.NegatedAssertion.base(this, 'apply', matcher,
+                                                 opt_message);
 };
 
-
-
 /**
  * Creates a new assertion.
  * @param {*} value The value to perform an assertion on.

Diff for: javascript/webdriver/webdriver.js

@@ -2433,7 +2433,8 @@ goog.inherits(webdriver.AlertPromise, webdriver.Alert);
  * @extends {bot.Error}
  */
 webdriver.UnhandledAlertError = function(message, text, alert) {
-  goog.base(this, bot.ErrorCode.UNEXPECTED_ALERT_OPEN, message);
+  webdriver.UnhandledAlertError.base(
+      this, 'constructor', bot.ErrorCode.UNEXPECTED_ALERT_OPEN, message);
 
   /** @private {string} */
   this.text_ = text;