Domain Reliability: Don't crash on shutdown with uploads pending

components/domain_reliability/monitor.cc

Index: components/domain_reliability/monitor.cc
diff --git a/components/domain_reliability/monitor.cc b/components/domain_reliability/monitor.cc
index c789be780a97568bf069e2f3508149ef7b21634f..9c56882ecb4de1e6571e6e0b5eaf97cf999215c3 100644
--- a/components/domain_reliability/monitor.cc
+++ b/components/domain_reliability/monitor.cc
@@ -155,6 +155,10 @@ void DomainReliabilityMonitor::InitURLRequestContext(
                                                 url_request_context_getter);
 }
 
+void DomainReliabilityMonitor::Shutdown() {
+  uploader_->Shutdown();
+}
+
 void DomainReliabilityMonitor::AddBakedInConfigs() {
   DCHECK(OnNetworkThread());
   DCHECK(moved_to_network_thread_);
@@ -249,6 +253,10 @@ DomainReliabilityContext* DomainReliabilityMonitor::AddContextForTesting(
   return context_manager_.AddContextForConfig(std::move(config));
 }
 
+void DomainReliabilityMonitor::ForceUploadsForTesting() {
+  dispatcher_.RunAllTasksForTesting();
+}
+
 std::unique_ptr<DomainReliabilityContext>
 DomainReliabilityMonitor::CreateContextForConfig(
     std::unique_ptr<const DomainReliabilityConfig> config) {