Respect QuicAllowed policy for new streams

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 0987d548b3e1a396416e03a3daf036876b9e53fa..5e591be55244e36e1712980554353ee8da24bcd1 100644
--- a/net/http/http_network_session.h
+++ b/net/http/http_network_session.h
@@ -209,6 +209,13 @@ class NET_EXPORT HttpNetworkSession
     bool restrict_to_one_preconnect_for_proxies;
   };
 
+  // Describes new Params values for a dynamic Params update.
+  // The purpose of this struct is that classes through which net params updates
+  // are "wired through" don't need to know about concrete parameters.
+  struct NET_EXPORT ParamsUpdate {
+    bool enable_quic_new;
+  };
+
   enum SocketPoolType {
     NORMAL_SOCKET_POOL,
     WEBSOCKET_SOCKET_POOL,
@@ -298,6 +305,15 @@ class NET_EXPORT HttpNetworkSession
   void DumpMemoryStats(base::trace_event::ProcessMemoryDump* pmd,
                        const std::string& parent_absolute_name) const;
 
+  // Evaluates if QUIC is enabled for new streams.
+  bool IsQuicEnabled() const;
+
+  // Sets QUIC enablement for new streams.
+  void SetQuicEnabled(bool quic_enabled);
+
+  // Update network params according to the passed |params_update|.
+  void UpdateParams(ParamsUpdate params_update);
+
  private:
   friend class HttpNetworkSessionPeer;