components: Change auto to not deduce raw pointers.

components/cronet/ios/Cronet.mm

Index: components/cronet/ios/Cronet.mm
diff --git a/components/cronet/ios/Cronet.mm b/components/cronet/ios/Cronet.mm
index ca2bfd9c2fc0771f5113d666539660e5237eb93a..c397eefbdebd9035ae0f0189127e5caa26b961aa 100644
--- a/components/cronet/ios/Cronet.mm
+++ b/components/cronet/ios/Cronet.mm
@@ -70,7 +70,7 @@ NSString* gSslKeyLogFileName = nil;
   gChromeNet.Get()->set_quic_enabled(gQuicEnabled);
   gChromeNet.Get()->set_ssl_key_log_file_name(
       base::SysNSStringToUTF8(gSslKeyLogFileName));
-  for (const auto& quicHint : gQuicHints) {
+  for (const auto* quicHint : gQuicHints) {
     gChromeNet.Get()->AddQuicHint(quicHint->host, quicHint->port,
                                   quicHint->alternate_port);
   }