Reporting: Implement serializer.

net/reporting/reporting_policy.h

Index: net/reporting/reporting_policy.h
diff --git a/net/reporting/reporting_policy.h b/net/reporting/reporting_policy.h
index 0cc31f9fdcef04192e64c2bee4f3047817249d8c..51bba69b403828cacb387f53252e86e906516172 100644
--- a/net/reporting/reporting_policy.h
+++ b/net/reporting/reporting_policy.h
@@ -18,18 +18,29 @@ struct NET_EXPORT ReportingPolicy {
   ReportingPolicy(const ReportingPolicy& other);
   ~ReportingPolicy();
 
+  // Backoff policy for failing endpoints.
+  BackoffEntry::Policy endpoint_backoff_policy;
+
+  // Minimum interval at which Reporting will persist state to (relatively)
+  // stable storage to be restored if the embedder restarts.
+  base::TimeDelta persistence_interval;
+
+  // Whether to persist undelivered reports across embedder restarts.
+  bool persist_reports_across_restarts;
+
+  // Whether to persist clients (per-origin endpoint configurations) across
+  // embedder restarts.
+  bool persist_clients_across_restarts;
+
+  // Minimum interval at which to garbage-collect the cache.
+  base::TimeDelta garbage_collection_interval;
+
   // Maximum age a report can be queued for before being discarded as expired.
   base::TimeDelta max_report_age;
 
   // Maximum number of delivery attempts a report can have before being
   // discarded as failed.
   int max_report_attempts;
-
-  // Backoff policy for failing endpoints.
-  BackoffEntry::Policy endpoint_backoff_policy;
-
-  // Minimum interval at which to garbage-collect the cache.
-  base::TimeDelta garbage_collection_interval;
 };
 
 }  // namespace net