Reporting: Implement garbage collector.

net/reporting/reporting_context.cc

Index: net/reporting/reporting_context.cc
diff --git a/net/reporting/reporting_context.cc b/net/reporting/reporting_context.cc
index 1252cd833ca78772732816cc635f9bdf4cff552c..c128497ac0080e0ee3b6d93aa7800c041add5866 100644
--- a/net/reporting/reporting_context.cc
+++ b/net/reporting/reporting_context.cc
@@ -13,11 +13,13 @@
 #include "base/time/default_tick_clock.h"
 #include "base/time/tick_clock.h"
 #include "base/time/time.h"
+#include "base/timer/timer.h"
 #include "net/base/backoff_entry.h"
 #include "net/reporting/reporting_cache.h"
 #include "net/reporting/reporting_delegate.h"
 #include "net/reporting/reporting_delivery_agent.h"
 #include "net/reporting/reporting_endpoint_manager.h"
+#include "net/reporting/reporting_garbage_collector.h"
 #include "net/reporting/reporting_observer.h"
 #include "net/reporting/reporting_policy.h"
 
@@ -35,6 +37,7 @@ class ReportingContextImpl : public ReportingContext {
       : ReportingContext(policy) {
     Init(std::move(delegate), base::MakeUnique<base::DefaultClock>(),
          base::MakeUnique<base::DefaultTickClock>(),
+         base::MakeUnique<base::OneShotTimer>(),
          ReportingUploader::Create(request_context));
   }
 };
@@ -71,15 +74,19 @@ ReportingContext::ReportingContext(const ReportingPolicy& policy)
     : policy_(policy),
       cache_(base::MakeUnique<ReportingCache>(this)),
       endpoint_manager_(base::MakeUnique<ReportingEndpointManager>(this)),
-      delivery_agent_(base::MakeUnique<ReportingDeliveryAgent>(this)) {}
+      delivery_agent_(base::MakeUnique<ReportingDeliveryAgent>(this)),
+      garbage_collector_(ReportingGarbageCollector::Create(this)) {}
 
-void ReportingContext::Init(std::unique_ptr<ReportingDelegate> delegate,
-                            std::unique_ptr<base::Clock> clock,
-                            std::unique_ptr<base::TickClock> tick_clock,
-                            std::unique_ptr<ReportingUploader> uploader) {
+void ReportingContext::Init(
+    std::unique_ptr<ReportingDelegate> delegate,
+    std::unique_ptr<base::Clock> clock,
+    std::unique_ptr<base::TickClock> tick_clock,
+    std::unique_ptr<base::Timer> garbage_collection_timer,
+    std::unique_ptr<ReportingUploader> uploader) {
   delegate_ = std::move(delegate);
   clock_ = std::move(clock);
   tick_clock_ = std::move(tick_clock);
+  garbage_collection_timer_ = std::move(garbage_collection_timer);
   uploader_ = std::move(uploader);
 }