Fix Javascript errors occuring when a file is deleted during calculating it's size.

chrome/browser/resources/file_manager/js/test_util.js

 // Copyright (c) 2013 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.
 
 /**
  * Namespace for test related things.
  */
 var test = test || {};
 
 /**
@@ skipping 25 matching lines @@
         callback(appId);
         return;
       }
     }
     window.setTimeout(helper, 50);
   }
   helper();
 };
 
 /**
+ * Gets total Javascript error count from each app window.
+ * @return {number} Error count.
+ */
+test.util.getErrorCount = function() {
+  var totalCount = 0;
+  for (var appId in appWindows) {
+    var contentWindow = appWindows[appId].contentWindow;
+    if (contentWindow.JSErrorCount)
+      totalCount += contentWindow.JSErrorCount;
+  }
+  return totalCount;
+};
+
+/**
  * Returns an array with the files currently selected in the file manager.
  *
  * @param {Window} contentWindow Window to be tested.
  * @return {Array.<string>} Array of selected files.
  */
 test.util.getSelectedFiles = function(contentWindow) {
   var table = contentWindow.document.querySelector('#detail-table');
   var rows = table.querySelectorAll('li');
   var selected = [];
   for (var i = 0; i < rows.length; ++i) {
@@ skipping 244 matching lines @@
         return false;
       }
       contentWindow = appWindows[request.appId].contentWindow;
     }
     if (!contentWindow) {
       // Global functions, not requiring a window.
       switch (request.func) {
         case 'openMainWindow':
           test.util.openMainWindow(request.args[0], sendResponse);
           return true;
+        case 'getErrorCount':
+          sendResponse(test.util.getErrorCount());
+          return true;
         default:
           console.error('Global function ' + request.func + ' not found.');
       }
     } else {
       // Functions working on a window.
       switch (request.func) {
         case 'getSelectedFiles':
           sendResponse(test.util.getSelectedFiles(contentWindow));
           return false;
         case 'getFileList':
@@ skipping 32 matching lines @@
         default:
           console.error('Window function ' + request.func + ' not found.');
       }
     }
     return false;
   });
 };
 
 // Register the test utils.
 test.util.registerRemoteTestUtils();