Reporting: Cap number of reports in cache.

net/reporting/reporting_cache.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_REPORTING_REPORTING_CACHE_H_
 #define NET_REPORTING_REPORTING_CACHE_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 141 matching lines @@
 
   bool IsReportPendingForTesting(const ReportingReport* report) const {
     return base::ContainsKey(pending_reports_, report);
   }
 
   bool IsReportDoomedForTesting(const ReportingReport* report) const {
     return base::ContainsKey(doomed_reports_, report);
   }
 
  private:
+  const ReportingReport* FindReportToEvict() const;
+
   void MaybeAddWildcardClient(const ReportingClient* client);
 
   void MaybeRemoveWildcardClient(const ReportingClient* client);
 
   void GetWildcardClientsForDomainAndGroup(
       const std::string& domain,
       const std::string& group,
       std::vector<const ReportingClient*>* clients_out) const;
 
   ReportingContext* context_;
@@ skipping 20 matching lines @@
   // Reports that have been marked doomed (would have been deleted, but were
   // pending when the deletion was requested).
   std::unordered_set<const ReportingReport*> doomed_reports_;
 
   DISALLOW_COPY_AND_ASSIGN(ReportingCache);
 };
 
 }  // namespace net
 
 #endif  // NET_REPORTING_REPORTING_CACHE_H_