Remove reference counting from HttpNetworkSession.

net/http/http_network_session_peer.h

Index: net/http/http_network_session_peer.h
diff --git a/net/http/http_network_session_peer.h b/net/http/http_network_session_peer.h
index 755e539cebb5f17c6e2c130cb035922c1248020e..ae57f39d2d77b3ab631f45d4de9fd9e04ab46144 100644
--- a/net/http/http_network_session_peer.h
+++ b/net/http/http_network_session_peer.h
@@ -18,8 +18,8 @@ class ProxyService;
 
 class NET_EXPORT_PRIVATE HttpNetworkSessionPeer {
  public:
-  explicit HttpNetworkSessionPeer(
-      const scoped_refptr<HttpNetworkSession>& session);
+  // |session| should outlive the HttpNetworkSessionPeer.
+  explicit HttpNetworkSessionPeer(HttpNetworkSession* session);
   ~HttpNetworkSessionPeer();
 
   void SetClientSocketPoolManager(
@@ -32,7 +32,7 @@ class NET_EXPORT_PRIVATE HttpNetworkSessionPeer {
       scoped_ptr<HttpStreamFactory> http_stream_factory_for_websocket);
 
  private:
-  const scoped_refptr<HttpNetworkSession> session_;
+  HttpNetworkSession* const session_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpNetworkSessionPeer);
 };