Print stack traces in child processes when browser tests failed.

chrome/test/data/webui/history_browsertest.js

 // Copyright (c) 2012 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.
 
 GEN('#include "chrome/test/data/webui/history_ui_browsertest.h"');
 
 /** @const */ var TOTAL_RESULT_COUNT = 160;
 /** @const */ var WAIT_TIMEOUT = 200;
 
 /**
@@ skipping 805 matching lines @@
   expectTrue(historyModel.isDeletingVisits());
 
   expectNotEquals(visit.dropDown, document.activeElement);
   testDone();
 });
 
 /**
  * Test individual deletion of history entries.
  */
 // Flakes on Win. http://crbug.com/334372#c3
-TEST_F('HistoryWebUIRealBackendTest', 'DISABLED_singleDeletion', function() {
+TEST_F('HistoryWebUIRealBackendTest', 'singleDeletion', function() {
   // Deletes the history entry represented by |entryElement|, and calls callback
   // when the deletion is complete.
   var removeEntry = function(entryElement, callback) {
     var dropDownButton = entryElement.querySelector('.drop-down');
     var removeMenuItem = $('remove-visit');
 
     assertFalse(dropDownButton.disabled);
     assertFalse(removeMenuItem.disabled);
 
     waitForCallback('onEntryRemoved', callback);
@@ skipping 291 matching lines @@
 TEST_F('HistoryWebUIWithSchemesTest', 'groupingWithSchemes', function() {
   // Switch to the week view.
   $('timeframe-controls').querySelectorAll('input')[1].click();
   waitForCallback('historyResult', function() {
     // Each URL should be organized under a different "domain".
     expectEquals(document.querySelectorAll('.entry').length, 4);
     expectEquals(document.querySelectorAll('.site-domain-wrapper').length, 4);
     testDone();
   });
 });