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// Copyright 2014 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.
/**
* This variable is checked in SelectFileDialogExtensionBrowserTest.
* @type {number}
*/
window.JSErrorCount = 0;
/**
* Counts uncaught exceptions.
*/
window.onerror = function() { window.JSErrorCount++; };
/**
* Wraps the function to use it as a callback.
* This does:
* - Capture the stack trace in case of error.
* - Bind this object
*
* @param {Object} thisObject Object to be used as this.
* @param {...} var_args Arguments to be bound with the wrapped function.
* @return {function} Wrapped function.
*/
Function.prototype.wrap = function(thisObject, var_args) {
var func = this;
var liveStack = (new Error('Stack trace before async call')).stack;
if (thisObject === undefined)
thisObject = null;
var boundArguments = Array.prototype.slice.call(arguments, 1);
return function wrappedCallback(var_args) {
try {
var args = boundArguments.concat(Array.prototype.slice.call(arguments));
return func.apply(thisObject, args);
} catch (e) {
// Some async function doesn't handle exception correctly. So outputting
// the exception message and stack trace just in case.
// The message will show twice if the caller handles exception correctly.
console.error(e.stack);
console.info('Exception above happened in callback.', liveStack);
window.JSErrorCount++;
throw e;
}
}
};
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