components: Change auto to not deduce raw pointers.

components/domain_reliability/header.cc

Index: components/domain_reliability/header.cc
diff --git a/components/domain_reliability/header.cc b/components/domain_reliability/header.cc
index 5a034047d2957f2888f8d561f8929936e77142da..1e9cb6af19f3ce35fab465fc63ed54d064b7858a 100644
--- a/components/domain_reliability/header.cc
+++ b/components/domain_reliability/header.cc
@@ -284,7 +284,7 @@ std::string DomainReliabilityHeader::ToString() const {
     DCHECK_EQ(0, max_age_s);
   } else {
     string += "report-uri=";
-    for (const auto& uri : config_->collectors)
+    for (const auto* uri : config_->collectors)
       string += uri->spec() + " ";
     // Remove trailing space.
     string.erase(string.length() - 1, 1);