Domain Reliability: Add more upload-related histograms.

components/domain_reliability/context_manager.cc

Index: components/domain_reliability/context_manager.cc
diff --git a/components/domain_reliability/context_manager.cc b/components/domain_reliability/context_manager.cc
index bcdb530de64d7b639438cf5a11e4fec6af57598c..81811c940c8edce21988bb2801e79904dbf33b29 100644
--- a/components/domain_reliability/context_manager.cc
+++ b/components/domain_reliability/context_manager.cc
@@ -6,6 +6,8 @@
 
 #include <utility>
 
+#include "base/metrics/histogram_macros.h"
+
 namespace domain_reliability {
 
 DomainReliabilityContextManager::DomainReliabilityContextManager(
@@ -24,7 +26,16 @@ void DomainReliabilityContextManager::RouteBeacon(
   if (!context)
     return;
 
-  context->OnBeacon(std::move(beacon));
+  bool queued = context->OnBeacon(std::move(beacon));
+  if (!queued)
+    return;
+
+  base::TimeTicks now = base::TimeTicks::Now();
+  if (!last_routed_beacon_time_.is_null()) {
+    UMA_HISTOGRAM_LONG_TIMES("DomainReliability.BeaconIntervalGlobal",
+                             now - last_routed_beacon_time_);
+  }
+  last_routed_beacon_time_ = now;
 }
 
 void DomainReliabilityContextManager::SetConfig(
@@ -45,7 +56,10 @@ void DomainReliabilityContextManager::SetConfig(
     // pending beacons and collector backoff state. Therefore, don't do so
     // needlessly; make sure the config has actually changed before recreating
     // the context.
-    if (contexts_[key]->config().Equals(*config)) {
+    bool config_same = contexts_[key]->config().Equals(*config);
+    UMA_HISTOGRAM_BOOLEAN("DomainReliability.SetConfigRecreatedContext",
+                          !config_same);
+    if (!config_same) {
       DVLOG(1) << "Ignoring unchanged NEL header for existing origin "
                << origin.spec() << ".";
       return;