Add ShouldDisplayOverFullscreen support to web notifications.

chrome/browser/notifications/notification_test_util.h

Index: chrome/browser/notifications/notification_test_util.h
diff --git a/chrome/browser/notifications/notification_test_util.h b/chrome/browser/notifications/notification_test_util.h
index 66b01e641b5e69d91edbcdaa9c9dfa785b066c9f..5fbb3112f4d14d10670e663d68aeee0c6e0072fe 100644
--- a/chrome/browser/notifications/notification_test_util.h
+++ b/chrome/browser/notifications/notification_test_util.h
@@ -15,6 +15,7 @@
 #include "chrome/browser/notifications/notification.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 
+class Browser;
 class Profile;
 
 // NotificationDelegate which does nothing, useful for testing when
@@ -73,4 +74,19 @@ class StubNotificationUIManager : public NotificationUIManager {
   DISALLOW_COPY_AND_ASSIGN(StubNotificationUIManager);
 };
 
+// Helper class that has to be created in the stack to check if the fullscreen
+// setting of a browser is in the desired state.
+class FullscreenStateWaiter {
+ public:
+  FullscreenStateWaiter(Browser* browser, bool desired_state);
+
+  void Wait();
+
+ private:
+  Browser* browser_;
+  bool desired_state_;
+
+  DISALLOW_COPY_AND_ASSIGN(FullscreenStateWaiter);
+};
+
 #endif  // CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_TEST_UTIL_H_