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

components/domain_reliability/monitor.h

Index: components/domain_reliability/monitor.h
diff --git a/components/domain_reliability/monitor.h b/components/domain_reliability/monitor.h
index a5a27261f941615b19f2a1496a18898908a34e86..29ba9935e18eb85950262d44f80f5ccc6f3dce8b 100644
--- a/components/domain_reliability/monitor.h
+++ b/components/domain_reliability/monitor.h
@@ -88,6 +88,10 @@ class DOMAIN_RELIABILITY_EXPORT DomainReliabilityMonitor
       const scoped_refptr<net::URLRequestContextGetter>&
           url_request_context_getter);
 
+  // Shuts down the monitor prior to destruction. Currently, ensures that there
+  // are no pending uploads, to avoid hairy lifetime issues at destruction.
+  void Shutdown();
+
   // Populates the monitor with contexts that were configured at compile time.
   void AddBakedInConfigs();
 
@@ -130,6 +134,10 @@ class DOMAIN_RELIABILITY_EXPORT DomainReliabilityMonitor
     return context_manager_.contexts_size_for_testing();
   }
 
+  // Forces all pending uploads to run now, even if their minimum delay has not
+  // yet passed.
+  void ForceUploadsForTesting();
+
   // DomainReliabilityContext::Factory implementation:
   std::unique_ptr<DomainReliabilityContext> CreateContextForConfig(
       std::unique_ptr<const DomainReliabilityConfig> config) override;