Use IPC to wait for download in DownloadTest.

chrome/browser/automation/automation_provider.h

 // Copyright (c) 2010 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 implements a browser-side endpoint for UI automation activity.
 // The client-side endpoint is implemented by AutomationProxy.
 // The entire lifetime of this object should be contained within that of
 // the BrowserProcess, and in particular the NotificationService that's
 // hung off of it.
 
@@ skipping 61 matching lines @@
 
   // Sets the number of tabs that we expect; when this number of tabs has
   // loaded, an AutomationMsg_InitialLoadsComplete message is sent.
   void SetExpectedTabCount(size_t expected_tabs);
 
   // Add a listener for navigation status notification. Currently only
   // navigation completion is observed; when the |number_of_navigations|
   // complete, the completed_response object is sent; if the server requires
   // authentication, we instead send the auth_needed_response object.  A pointer
   // to the added navigation observer is returned. This object should NOT be
-  // deleted and should be released by calling the corresponding
-  // RemoveNavigationStatusListener method.
+  // deleted and should be released by calling the RemoveObserver method.
   NotificationObserver* AddNavigationStatusListener(
       NavigationController* tab, IPC::Message* reply_message,
       int number_of_navigations, bool include_current_navigation);
 
-  void RemoveNavigationStatusListener(NotificationObserver* obs);
-
   // Add an observer for the TabStrip. Currently only Tab append is observed. A
   // navigation listener is created on successful notification of tab append. A
   // pointer to the added navigation observer is returned. This object should
-  // NOT be deleted and should be released by calling the corresponding
-  // RemoveTabStripObserver method.
+  // NOT be deleted and should be released by calling the RemoveObserver method.
   NotificationObserver* AddTabStripObserver(Browser* parent,
                                             IPC::Message* reply_message);
-  void RemoveTabStripObserver(NotificationObserver* obs);
+
+  // Remove an observer. The |NotificationObserver| still needs to be deleted
+  // afterwards.
+  void RemoveObserver(NotificationObserver* obs);
 
   // Get the index of a particular NavigationController object
   // in the given parent window.  This method uses
   // TabStrip::GetIndexForNavigationController to get the index.
   int GetIndexForNavigationController(const NavigationController* controller,
                                       const Browser* parent) const;
 
   // Add or remove a non-owning reference to a tab's LoginHandler.  This is for
   // when a login prompt is shown for HTTP/FTP authentication.
   // TODO(mpcomplete): The login handling is a fairly special purpose feature.
@@ skipping 219 matching lines @@
   void SetBookmarkTitle(int handle,
                         int64 id, std::wstring title,
                         bool* success);
   void SetBookmarkURL(int handle,
                       int64 id, const GURL& url,
                       bool* success);
   void RemoveBookmark(int handle,
                       int64 id,
                       bool* success);
 
+  // Wait for the download shelf to appear or disappear.
+  void WaitForDownloadShelfVisibilityChange(int browser_handle,
+                                            bool visibility,
+                                            IPC::Message* reply_message);
   // Set window dimensions.
   // Uses the JSON interface for input/output.
   void SetWindowDimensions(Browser* browser,
                            DictionaryValue* args,
                            IPC::Message* reply_message);
 
   // Get info about the chromium/chrome in use.
   // This includes things like version, executable name, executable path.
   // Uses the JSON interface for input/output.
   void GetBrowserInfo(Browser* browser,
@@ skipping 497 matching lines @@
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   void OnRemoveProvider();  // Called via PostTask
 
   NotificationRegistrar registrar_;
 };
 
 #endif  // CHROME_BROWSER_AUTOMATION_AUTOMATION_PROVIDER_H_