Fixes crash if instant is enabled and you block JS.

content/common/notification_type.h

Index: content/common/notification_type.h
diff --git a/content/common/notification_type.h b/content/common/notification_type.h
index 0cb27cc650051f4dece29612e3f45ea73e239ec5..a908dc08d37ddff2d29388f8668f3f3deb73a7f3 100644
--- a/content/common/notification_type.h
+++ b/content/common/notification_type.h
@@ -1293,6 +1293,11 @@ class NotificationType {
     // Sent each time the InstantController shows the InstantLoader.
     INSTANT_CONTROLLER_SHOWN,
 
+    // Sent when the instant loader determines whether the page supports the
+    // instant API or not. The details is a boolean indicating if the page
+    // supports instant. The source is not used.
+    INSTANT_SUPPORT_DETERMINED,
+
     // Password Store ----------------------------------------------------------
     // This notification is sent whenenever login entries stored in the password
     // store are changed. The detail of this notification is a list of changes