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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 'use strict'; | |
6 | |
7 /** | |
8 * This variable is checked in SelectFileDialogExtensionBrowserTest. | |
9 * @type {number} | |
10 */ | |
11 window.JSErrorCount = 0; | |
12 | |
13 /** | |
14 * Counts uncaught exceptions. | |
15 */ | |
16 window.onerror = function() { window.JSErrorCount++; }; | |
17 | |
18 /** | |
19 * Wraps the function to use it as a callback. | |
20 * This does: | |
21 * - Capture the stack trace in case of error. | |
22 * - Bind this object | |
23 * | |
24 * @param {Object} thisObject Object to be used as this. | |
25 * @return {function} Wapped function. | |
26 */ | |
27 Function.prototype.wrap = function(thisObject) { | |
28 var func = this; | |
29 var liveStack = (new Error('Stack trace before async call')).stack; | |
30 if (thisObject === undefined) | |
31 thisObject = null; | |
32 | |
33 return function wrappedCallback() { | |
34 try { | |
35 return func.apply(thisObject, arguments); | |
36 } catch (e) { | |
37 console.error('Exception happens in callback.', liveStack); | |
38 | |
39 window.JSErrorCount++; | |
40 throw e; | |
41 } | |
42 } | |
43 }; | |
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