DevTools: prep audits panel for Lighthouse roll

third_party/WebKit/Source/devtools/front_end/audits2_worker/Audits2Service.js

 // Copyright (c) 2016 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.
 /**
  * @interface
  */
 class LighthousePort {
   /**
    * @param {!string} eventName, 'message', 'close'
    * @param {function(string|undefined)} cb
@@ skipping 38 matching lines @@
         .then(/** @type {!ReportRenderer.ReportJSON} */ result => {
           // Filter out artifacts except for screenshots in traces to minimize report size.
           var traces = result.artifacts.traces;
           for (var pass in traces) {
             traces[pass]['traceEvents'] =
                 traces[pass]['traceEvents'].filter(e => e['cat'] === 'disabled-by-default-devtools.screenshot');
           }
           result.artifacts = {traces: traces};
           return result;
         })
-        .catchException(null);
+        .catch(err => ({
+                 fatal: true,
+                 message: err.message,
+                 stack: err.stack,
+               }));
   }
 
   /**
    * @return {!Promise}
    */
   stop() {
     this.close();
     return Promise.resolve();
   }
 
@@ skipping 44 matching lines @@
 };
 
 // Make lighthouse and traceviewer happy.
 global = self;
 global.isVinn = true;
 global.document = {};
 global.document.documentElement = {};
 global.document.documentElement.style = {
   WebkitAppearance: 'WebkitAppearance'
 };