Remove enable_notifications build flag and define

chrome/browser/permissions/permission_infobar_delegate.cc

Index: chrome/browser/permissions/permission_infobar_delegate.cc
diff --git a/chrome/browser/permissions/permission_infobar_delegate.cc b/chrome/browser/permissions/permission_infobar_delegate.cc
index 33131dcea2560f153be2075c62715165b1f82fa0..3d7ef8212a3b79df1f3af138220e75984ed75828 100644
--- a/chrome/browser/permissions/permission_infobar_delegate.cc
+++ b/chrome/browser/permissions/permission_infobar_delegate.cc
@@ -52,13 +52,11 @@ PermissionInfoBarDelegate::CreateDelegate(
       return std::unique_ptr<PermissionInfoBarDelegate>(
               new GeolocationInfoBarDelegateAndroid(
                   requesting_frame, user_gesture, profile, callback));
-#if defined(ENABLE_NOTIFICATIONS)
     case content::PermissionType::NOTIFICATIONS:
     case content::PermissionType::PUSH_MESSAGING:
       return std::unique_ptr<PermissionInfoBarDelegate>(
           new NotificationPermissionInfoBarDelegate(
               type, requesting_frame, user_gesture, profile, callback));
-#endif  // ENABLE_NOTIFICATIONS
     case content::PermissionType::MIDI_SYSEX:
       return std::unique_ptr<PermissionInfoBarDelegate>(
               new MidiPermissionInfoBarDelegateAndroid(