Remove chrome::NOTIFICATION_INSTANT_TAB_SUPPORT_DETERMINED

chrome/browser/chrome_notification_types.h

Index: chrome/browser/chrome_notification_types.h
diff --git a/chrome/browser/chrome_notification_types.h b/chrome/browser/chrome_notification_types.h
index ef58d5b81e2b1c75e0e62bd582aa78f5d34f1c2d..a979d362af7ae903c4720272c51dc045913aeda0 100644
--- a/chrome/browser/chrome_notification_types.h
+++ b/chrome/browser/chrome_notification_types.h
@@ -435,10 +435,6 @@ enum NotificationType {
   // menu has been created and shown.
   NOTIFICATION_RENDER_VIEW_CONTEXT_MENU_SHOWN,
 
-  // Sent when the Instant Controller determines whether an Instant tab supports
-  // the Instant API or not.
-  NOTIFICATION_INSTANT_TAB_SUPPORT_DETERMINED,
-
   // Sent when the CaptivePortalService checks if we're behind a captive portal.
   // The Source is the Profile the CaptivePortalService belongs to, and the
   // Details are a Details<CaptivePortalService::CheckResults>.