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..e7c68a62b155ae9e885879d644dd1f4f7a2d46b3 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 +74,20 @@ 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:
+  explicit FullscreenStateWaiter(Browser* browser, bool desired_state);

[Peter Beverloo, 2016/09/29 21:30:52]

nit: no need to make this explicit (we only do that for single-argument
constructors)

[bmalcolm, 2016/09/29 21:37:13]

Done.

+
+  void Wait();
+
+ private:
+  Browser* browser_;
+  bool desired_state_;
+
+  DISALLOW_COPY_AND_ASSIGN(FullscreenStateWaiter);
+};
+

[Peter Beverloo, 2016/09/29 21:30:52]

micro nit: no double blank lines

[bmalcolm, 2016/09/29 21:37:13]

Done.

+
 #endif  // CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_TEST_UTIL_H_