Add experimental feature info to certificate reports

components/network_time/network_time_tracker.h

Index: components/network_time/network_time_tracker.h
diff --git a/components/network_time/network_time_tracker.h b/components/network_time/network_time_tracker.h
index fb9aa4ef7a023f6f1d163b8884639e2a13ad7821..6f226b1008692597603349b300911bf604418568 100644
--- a/components/network_time/network_time_tracker.h
+++ b/components/network_time/network_time_tracker.h
@@ -46,6 +46,9 @@ const int64_t kTicksResolutionMs = 1;  // Assume 1ms for non-windows platforms.
 
 // Variations Service feature that enables network time service querying.
 extern const base::Feature kNetworkTimeServiceQuerying;
+// Parameter name for the network time experiment that controls whether
+// time queries can be issued on-demand.

[jwd, 2016/11/03 15:15:34]

Seeing as I've asked you to reduce the magicness of what params get reported,
could you add a comment somewhere that makes sense (maybe here?) that new
parameters need to be added in cert_report_helper for them to be included in
cert reports?

+extern const char kVariationsServiceEnableFetchesOnDemand[];
 
 // A class that receives network time updates and can provide the network time
 // for a corresponding local time. This class is not thread safe.