Disallow showing offline previews on a reload.

components/previews/core/previews_black_list.h

Index: components/previews/core/previews_black_list.h
diff --git a/components/previews/core/previews_black_list.h b/components/previews/core/previews_black_list.h
index e9151da625cf736a358f815ace26af04524eb465..6abac75b2e7506984d6bddd1c111d0c98cf1c426 100644
--- a/components/previews/core/previews_black_list.h
+++ b/components/previews/core/previews_black_list.h
@@ -49,7 +49,9 @@ enum class PreviewsEligibilityReason {
   NETWORK_QUALITY_UNAVAILABLE = 6,
   // The network was fast enough to not warrant previews.
   NETWORK_NOT_SLOW = 7,
-  LAST = 8,
+  // If the page was reloaded, the user should not be shown an offline preview.

[tbansal1, 2016/12/12 19:52:21]

Should the user be shown the offline page if they are still offline after the
reload?

[RyanSturm, 2016/12/12 22:42:15]

This isn't the offline pages so much as offline previews. If the user reloads,
if they are offline, they will still be shown an offline page due to the normal
offline page logic.

+  RELOAD_DISALLOWED_FOR_OFFLINE = 8,
+  LAST = 9,
 };
 
 // Manages the state of black listed domains for the previews experiment. Loads