Remove FileError interface

third_party/WebKit/Source/devtools/front_end/timeline/TimelineLoader.js

 // Copyright 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.
 
 /**
  * @constructor
  * @implements {WebInspector.OutputStream}
  * @implements {WebInspector.OutputStreamDelegate}
  * @param {!WebInspector.TracingModel} model
  * @param {!WebInspector.TimelineLifecycleDelegate} delegate
@@ skipping 196 matching lines @@
      */
     onTransferFinished: function() {},
 
     /**
      * @override
      * @param {!WebInspector.ChunkedReader} reader
      * @param {!Event} event
      */
     onError: function(reader, event)
     {
-        switch (event.target.error.code) {
-        case FileError.NOT_FOUND_ERR:
+        switch (event.target.error.name) {

[pfeldman, 2016/07/12 21:29:44]

Was name previously available? If not, you would need to install it in the
compat layer in devtools.js

[jsbell, 2016/07/13 16:55:07]

Yes; FileError started inheriting from DOMError circa 2013, and DOMError has had
name since 2012 (when the interface was first added).

+        case 'NotFoundError':
             this._reportErrorAndCancelLoading(WebInspector.UIString("File \"%s\" not found.", reader.fileName()));
             break;
-        case FileError.NOT_READABLE_ERR:
+        case 'NotReadableError':
             this._reportErrorAndCancelLoading(WebInspector.UIString("File \"%s\" is not readable", reader.fileName()));
             break;
-        case FileError.ABORT_ERR:
+        case 'AbortError':
             break;
         default:
             this._reportErrorAndCancelLoading(WebInspector.UIString("An error occurred while reading the file \"%s\"", reader.fileName()));
         }
     }
 }
 
 /**
  * @constructor
  * @implements {WebInspector.OutputStreamDelegate}
@@ skipping 23 matching lines @@
      * @override
      * @param {!WebInspector.ChunkedReader} reader
      * @param {!Event} event
      */
     onError: function(reader, event)
     {
         var error = event.target.error;
         WebInspector.console.error(WebInspector.UIString("Failed to save timeline: %s (%s, %s)", error.message, error.name, error.code));
     }
 }