components: Change auto to not deduce raw pointers.

components/update_client/request_sender.cc

Index: components/update_client/request_sender.cc
diff --git a/components/update_client/request_sender.cc b/components/update_client/request_sender.cc
index 7f48dd72351f45df8654af95bcf04c57f29211e2..b99648a6c259a4239ccd617bfbacf9f5e48ba6bf 100644
--- a/components/update_client/request_sender.cc
+++ b/components/update_client/request_sender.cc
@@ -207,7 +207,7 @@ GURL RequestSender::BuildUpdateUrl(const GURL& url,
 
 std::string RequestSender::GetStringHeaderValue(const net::URLFetcher* source,
                                                 const char* header_name) {
-  const auto response_headers(source->GetResponseHeaders());
+  auto* response_headers(source->GetResponseHeaders());
   if (!response_headers)
     return std::string();
 
@@ -219,7 +219,7 @@ std::string RequestSender::GetStringHeaderValue(const net::URLFetcher* source,
 
 int64_t RequestSender::GetInt64HeaderValue(const net::URLFetcher* source,
                                            const char* header_name) {
-  const auto response_headers(source->GetResponseHeaders());
+  auto* response_headers(source->GetResponseHeaders());
   return response_headers ? response_headers->GetInt64HeaderValue(header_name)
                           : -1;
 }