Remove many delegates, let's see what breaks

chrome/browser/extensions/api/notifications/extension_notification_handler.h

Index: chrome/browser/extensions/api/notifications/extension_notification_handler.h
diff --git a/chrome/browser/extensions/api/notifications/extension_notification_handler.h b/chrome/browser/extensions/api/notifications/extension_notification_handler.h
index ba098bd9773571eee6aa6a7323534fc609588900..3a7cd710c7107231f62ad14053955a4081d8d24a 100644
--- a/chrome/browser/extensions/api/notifications/extension_notification_handler.h
+++ b/chrome/browser/extensions/api/notifications/extension_notification_handler.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_EXTENSIONS_API_NOTIFICATIONS_EXTENSION_NOTIFICATION_HANDLER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_NOTIFICATIONS_EXTENSION_NOTIFICATION_HANDLER_H_
 
+#include "base/feature_list.h"
 #include "base/macros.h"
 #include "chrome/browser/notifications/notification_handler.h"
 #include "extensions/browser/event_router.h"
@@ -13,6 +14,10 @@ class Profile;
 
 namespace extensions {
 
+// Exposed publicly for tests.
+// TODO(miguelg) we can probably get rid of this now.
+extern const base::Feature kAllowFullscreenAppNotificationsFeature;
+
 // Handler for notifications shown by extensions. Will be created and owned by
 // the NativeNotificationDisplayService.
 class ExtensionNotificationHandler : public NotificationHandler {
@@ -32,6 +37,8 @@ class ExtensionNotificationHandler : public NotificationHandler {
                int action_index,
                const base::NullableString16& reply) override;
   void OpenSettings(Profile* profile) override;
+  bool ShouldDisplayOnFullScreen(Profile* profile,
+                                 const std::string& origin) const override;
 
  protected:
   // Overriden in unit tests.