components: Change auto to not deduce raw pointers.

components/domain_reliability/context.cc

Index: components/domain_reliability/context.cc
diff --git a/components/domain_reliability/context.cc b/components/domain_reliability/context.cc
index 34b27cbf24bcab9d73375c4dff9ea1e79345d296..723614a8172adc6548ff03cf3d62d88beae2c283 100644
--- a/components/domain_reliability/context.cc
+++ b/components/domain_reliability/context.cc
@@ -204,7 +204,7 @@ std::unique_ptr<const Value> DomainReliabilityContext::CreateReport(
   int max_upload_depth = 0;
 
   std::unique_ptr<ListValue> beacons_value(new ListValue());
-  for (const auto& beacon : beacons_) {
+  for (const auto* beacon : beacons_) {
     beacons_value->Append(beacon->ToValue(upload_time,
                                           *last_network_change_time_,
                                           collector_url,