Add feature for running limitless prefetching of Offline Pages.

Adds a new debugging/developer feature to control the resource usage
restrictions imposed on the Prefetching of Offline Pages feature.

Bug: 793109
Change-Id: If0a52be83c79f7f821c0a2811ca60364ead70791
Reviewed-on: https://chromium-review.googlesource.com/815282
Commit-Queue: Carlos Knippschild <[email protected]>
Reviewed-by: Filip Gorski <[email protected]>
Cr-Commit-Position: refs/heads/master@{#522972}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 524022a..e0898576 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -1236,6 +1236,9 @@
 extern const char kOfflinePagesCtV2Name[];
 extern const char kOfflinePagesCtV2Description[];
 
+extern const char kOfflinePagesLimitlessPrefetchingName[];
+extern const char kOfflinePagesLimitlessPrefetchingDescription[];
+
 extern const char kOfflinePagesLoadSignalCollectingName[];
 extern const char kOfflinePagesLoadSignalCollectingDescription[];