Add PrerenderUnload browser test

chrome/test/ui_test_utils.h

 // 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.
 
 #ifndef CHROME_TEST_UI_TEST_UTILS_H_
 #define CHROME_TEST_UI_TEST_UTILS_H_
 #pragma once
 
 #include <map>
 #include <queue>
@@ skipping 537 matching lines @@
 bool TakeRenderWidgetSnapshot(RenderWidgetHost* rwh,
                               const gfx::Size& page_size,
                               SkBitmap* bitmap) WARN_UNUSED_RESULT;
 
 // Takes a snapshot of the entire page, according to the width and height
 // properties of the DOM's document. Returns true on success. DOMAutomation
 // must be enabled.
 bool TakeEntirePageSnapshot(RenderViewHost* rvh,
                             SkBitmap* bitmap) WARN_UNUSED_RESULT;
 
+// Watches title changes on a tab, blocking until an expected title is set.
+class TitleWatcher : public NotificationObserver {
+ public:
+  // |tab_contents| must be non-NULL and needs to stay alive for the
+  // entire lifetime of |this|. |expected_title| is the title that |this|
+  // will wait for.
+  TitleWatcher(TabContents* tab_contents, const string16& expected_title);
+  ~TitleWatcher();
+
+  // Waits until the title for the tab is set to the |expected_title|
+  // passed into the constructor.
+  bool WaitForTitleChange() WARN_UNUSED_RESULT;

[Paweł Hajdan Jr., 2011/06/09 20:08:27]

And now, please make it consistent with WindowedNotificationObserver (could you
put those two classes close to each other?). Just "Wait" instead of
"WaitForTitleChange".

[cbentzel, 2011/06/10 00:41:31]

Done.

+
+ private:
+  // NotificationObserver
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details) OVERRIDE;
+
+  TabContents* expected_tab_;
+  string16 expected_title_;
+  NotificationRegistrar notification_registrar_;
+  bool title_observed_;
+  bool quit_loop_on_observation_;
+
+  DISALLOW_COPY_AND_ASSIGN(TitleWatcher);
+};
+
 }  // namespace ui_test_utils
 
 #endif  // CHROME_TEST_UI_TEST_UTILS_H_