Small: Add store specific histograms also.

components/safe_browsing_db/v4_local_database_manager.cc

Index: components/safe_browsing_db/v4_local_database_manager.cc
diff --git a/components/safe_browsing_db/v4_local_database_manager.cc b/components/safe_browsing_db/v4_local_database_manager.cc
index e640abe9d62121bd5014e2fd59ca4ca61eaa795d..e256813b11f69fbc628de2538285c415766d90e5 100644
--- a/components/safe_browsing_db/v4_local_database_manager.cc
+++ b/components/safe_browsing_db/v4_local_database_manager.cc
@@ -26,6 +26,8 @@ const ThreatSeverity kLeastSeverity =
     std::numeric_limits<ThreatSeverity>::max();
 
 ListInfos GetListInfos() {
+  // NOTE(vakh): When adding a store here, add the corresponding store-specific
+  // histograms also.
   return ListInfos(
       {ListInfo(true, "UrlMalware.store", GetUrlMalwareId(),
                 SB_THREAT_TYPE_URL_MALWARE),