net: Change auto to not deduce raw pointers.

net/quic/quic_spdy_session.cc

Index: net/quic/quic_spdy_session.cc
diff --git a/net/quic/quic_spdy_session.cc b/net/quic/quic_spdy_session.cc
index 9a3b8ccbaea8cea8bd58fcc15c8a835822d42d90..ef0a422031cdddbe5b34b1115cd0671f6cb1844f 100644
--- a/net/quic/quic_spdy_session.cc
+++ b/net/quic/quic_spdy_session.cc
@@ -21,7 +21,7 @@ QuicSpdySession::QuicSpdySession(QuicConnection* connection,
 QuicSpdySession::~QuicSpdySession() {
   // Set the streams' session pointers in closed and dynamic stream lists
   // to null to avoid subsequent use of this session.
-  for (auto const& stream : *closed_streams()) {
+  for (auto* stream : *closed_streams()) {
     static_cast<QuicSpdyStream*>(stream)->ClearSession();
   }
   for (auto const& kv : dynamic_streams()) {