[Net] Propagate priority changes from HttpNetworkTransaction to its request

net/http/http_stream_factory.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 NET_HTTP_HTTP_STREAM_FACTORY_H_
 #define NET_HTTP_HTTP_STREAM_FACTORY_H_
 
 #include <list>
 #include <string>
 #include <vector>
@@ skipping 139 matching lines @@
   virtual ~HttpStreamRequest() {}
 
   // When a HttpStream creation process is stalled due to necessity
   // of Proxy authentication credentials, the delegate OnNeedsProxyAuth
   // will have been called.  It now becomes the delegate's responsibility
   // to collect the necessary credentials, and then call this method to
   // resume the HttpStream creation process.
   virtual int RestartTunnelWithProxyAuth(
       const AuthCredentials& credentials) = 0;
 
+  // Called when the priority of the parent transaction changes.
+  virtual void SetPriority(RequestPriority priority) = 0;
+
   // Returns the LoadState for the request.
   virtual LoadState GetLoadState() const = 0;
 
   // Returns true if TLS/NPN was negotiated for this stream.
   virtual bool was_npn_negotiated() const = 0;
 
   // Protocol negotiated with the server.
   virtual NextProto protocol_negotiated() const = 0;
 
   // Returns true if this stream is being fetched over SPDY.
@@ skipping 127 matching lines @@
   static bool force_spdy_over_ssl_;
   static bool force_spdy_always_;
   static std::list<HostPortPair>* forced_spdy_exclusions_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpStreamFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_H_