Remove ref to goog.inherit which will be removed. (bazelbuild#646)

Author: gkdn

closure/testing/library/jsunitexception.js

@@ -10,31 +10,30 @@ goog.setTestOnly();
 goog.require('goog.testing.stacktrace');
 
 
-/**
- * @param {string} comment A summary for the exception.
- * @param {?string=} opt_message A description of the exception.
- * @constructor
- * @extends {Error}
- * @final
- */
-goog.testing.JsUnitException = function(comment, opt_message) {
-  'use strict';
-  this.isJsUnitException = true;
-  this.message =
-      goog.testing.JsUnitException.generateMessage(comment, opt_message);
-  this.stackTrace = goog.testing.stacktrace.get();
-  // These fields are for compatibility with jsUnitTestManager.
-  this.comment = comment || null;
-  this.jsUnitMessage = opt_message || '';
-
-  // Ensure there is a stack trace.
-  if (Error.captureStackTrace) {
-    Error.captureStackTrace(this, goog.testing.JsUnitException);
-  } else {
-    this.stack = new Error().stack || '';
+goog.testing.JsUnitException = class extends Error {
+  /**
+   * @param {string} comment A summary for the exception.
+   * @param {?string=} opt_message A description of the exception.
+   */
+  constructor(comment, opt_message) {
+    'use strict';
+    super();
+    this.isJsUnitException = true;
+    this.message =
+        goog.testing.JsUnitException.generateMessage(comment, opt_message);
+    this.stackTrace = goog.testing.stacktrace.get();
+    // These fields are for compatibility with jsUnitTestManager.
+    this.comment = comment || null;
+    this.jsUnitMessage = opt_message || '';
+
+    // Ensure there is a stack trace.
+    if (Error.captureStackTrace) {
+      Error.captureStackTrace(this, goog.testing.JsUnitException);
+    } else {
+      this.stack = new Error().stack || '';
+    }
   }
 };
-goog.inherits(goog.testing.JsUnitException, Error);
 
 /**
  * @param {string} comment A summary for the exception.