Respect QuicAllowed policy for new streams

chrome/browser/io_thread.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 218 matching lines @@
 
   // Clears the host cache. Intended to be used to prevent exposing recently
   // visited sites on about:net-internals/#dns and about:dns pages.  Must be
   // called on the IO thread. If |host_filter| is not null, only hosts matched
   // by it are deleted from the cache.
   void ClearHostCache(
       const base::Callback<bool(const std::string&)>& host_filter);
 
   const net::HttpNetworkSession::Params& NetworkSessionParams() const;
 
+  // Dynamically update network session params.
+  // Applies to the params_ object owned by io_thread and to the
+  // HttpNetworkSession instances owned by io_thread, if they have been already
+  // created.
+  void UpdateNetworkSessionParams(
+      net::HttpNetworkSession::ParamsUpdate params_update);
+
   base::TimeTicks creation_time() const;
 
   // Returns the callback for updating data use prefs.
   metrics::UpdateUsagePrefCallbackType GetMetricsDataUseForwarder();
 
   // Registers the |observer| for new STH notifications.
   void RegisterSTHObserver(net::ct::STHObserver* observer);
 
   // Un-registers the |observer|.
   void UnregisterSTHObserver(net::ct::STHObserver* observer);
@@ skipping 149 matching lines @@
   bool http_09_on_non_default_ports_enabled_;
 
   const base::TimeTicks creation_time_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_