Add certificate error handling to devtools.

third_party/WebKit/Source/devtools/front_end/security/SecurityModel.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.
 /**
  * @unrestricted
  */
 Security.SecurityModel = class extends SDK.SDKModel {
   /**
    * @param {!SDK.Target} target
    */
@@ skipping 90 matching lines @@
    * @param {boolean} schemeIsCryptographic
    * @param {!Array<!Protocol.Security.SecurityStateExplanation>} explanations
    * @param {!Protocol.Security.InsecureContentStatus} insecureContentStatus
    * @param {?string=} summary
    */
   securityStateChanged(securityState, schemeIsCryptographic, explanations, insecureContentStatus, summary) {
     var pageSecurityState = new Security.PageSecurityState(
         securityState, schemeIsCryptographic, explanations, insecureContentStatus, summary || null);
     this._model.dispatchEventToListeners(Security.SecurityModel.Events.SecurityStateChanged, pageSecurityState);
   }
+
+
+  /**
+   * @override
+   * @param {number} eventId
+   * @param {string} errorType
+   * @param {string} requestURL
+   */
+  certificateError(eventId, errorType, requestURL) {
+  }
 };