File Manager: Assorted fixes and polish

chrome/browser/resources/file_manager/js/mock_chrome.js

 // Copyright (c) 2011 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.
 
 /**
  * Mock out the chrome.fileBrowserPrivate API for use in the harness.
  */
 chrome.fileBrowserPrivate = {
 
   /**
@@ skipping 90 matching lines @@
       for (var taskIndex = candidateTasks.length - 1; taskIndex >= 0;
            taskIndex--) {
         if (candidateTasks[taskIndex].regexp.test(urlList[i]))
           continue;
 
         // This task doesn't match this url, remove the task.
         candidateTasks.splice(taskIndex, 1);
       }
     }
 
-    callback(candidateTasks);

[rginda, 2011/08/26 22:41:03]

Test harness didn't exhibit the multiple-task-buttons bug because we invoked the
callback synchronously with no delay.

+    setTimeout(function() {
+      callback(candidateTasks);
+    }, 200);
   },
 
   /**
    * Executes a task.
    */
   executeTask: function(taskId, urlList) {
     console.log('executing task: ' + taskId + ': ' + urlList.length + ' urls');
     var parts = taskId.split('|');
     taskId = parts[parts.length - 1];
     function createEntry(url) {
@@ skipping 209 matching lines @@
 };
 
 chrome.fileBrowserHandler = {
   onExecute: {
     listeners_: [],
     addListener: function(listener) {
       chrome.fileBrowserHandler.onExecute.listeners_.push(listener);
     }
   }
 };