Remove reference counting from HttpNetworkSession.

net/http/http_network_session.h

Index: net/http/http_network_session.h
diff --git a/net/http/http_network_session.h b/net/http/http_network_session.h
index 50c319d37c4e3c3948afa56ecd12ab02428b7e44..bad31bc21e038923475e01c07529d044447eb8e3 100644
--- a/net/http/http_network_session.h
+++ b/net/http/http_network_session.h
@@ -56,8 +56,7 @@ class TransportSecurityState;
 
 // This class holds session objects used by HttpNetworkTransaction objects.
 class NET_EXPORT HttpNetworkSession
-    : public base::RefCounted<HttpNetworkSession>,
-      NON_EXPORTED_BASE(public base::NonThreadSafe) {
+    : NON_EXPORTED_BASE(public base::NonThreadSafe) {
  public:
   struct NET_EXPORT Params {
     Params();
@@ -138,6 +137,7 @@ class NET_EXPORT HttpNetworkSession
   };
 
   explicit HttpNetworkSession(const Params& params);
+  ~HttpNetworkSession();
 
   HttpAuthCache* http_auth_cache() { return &http_auth_cache_; }
   SSLClientAuthCache* ssl_client_auth_cache() {
@@ -210,11 +210,8 @@ class NET_EXPORT HttpNetworkSession
   bool HasSpdyExclusion(HostPortPair host_port_pair) const;
 
  private:
-  friend class base::RefCounted<HttpNetworkSession>;
   friend class HttpNetworkSessionPeer;
 
-  ~HttpNetworkSession();
-
   ClientSocketPoolManager* GetSocketPoolManager(SocketPoolType pool_type);
 
   NetLog* const net_log_;