Add PrerenderUnload browser test

chrome/test/ui_test_utils.h

Index: chrome/test/ui_test_utils.h
diff --git a/chrome/test/ui_test_utils.h b/chrome/test/ui_test_utils.h
index fefbb4feadd7b0f7832df0087adab1e890bad41d..3b735bbc62c471f53edae1f76e6151d607f222fe 100644
--- a/chrome/test/ui_test_utils.h
+++ b/chrome/test/ui_test_utils.h
@@ -555,6 +555,34 @@ bool TakeRenderWidgetSnapshot(RenderWidgetHost* rwh,
 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_