Add enum description for RESOURCE_REQUESTS_NOT_ALLOWED_NETWORK_STATE_NOT_INITIALIZED

This enum was added in http://crrev.com/c/1198102

Bug: 868021
Change-Id: I6f18a3b243a4c02385e160a31db767ae4bfe8f64
Reviewed-on: https://chromium-review.googlesource.com/1219897Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590410}

components/variations/service/variations_service.cc

@@ -122,6 +122,7 @@ std::string GetRestrictParameterPref(VariationsServiceClient* client,
   return policy_pref_service->GetString(prefs::kVariationsRestrictParameter);
 }
 
+// Reported to UMA, keep in sync with enums.xml and don't renumber entries.
 enum ResourceRequestsAllowedState {
   RESOURCE_REQUESTS_ALLOWED,
   RESOURCE_REQUESTS_NOT_ALLOWED,

tools/metrics/histograms/enums.xml

@@ -49473,6 +49473,7 @@ Full version information for the fingerprint enum values:
   <int value="3" label="Requests not allowed: EULA not accepted"/>
   <int value="4" label="Requests not allowed: network down"/>
   <int value="5" label="Requests not allowed: disabled by command line"/>
+  <int value="6" label="Waiting for network status"/>
 </enum>
 
 <enum name="VariationsSeedDateChange">