[Net] Propagate priority changes from URLRequest to HttpTransaction

net/http/http_transaction.h

 // Copyright (c) 2011 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_TRANSACTION_H_
 #define NET_HTTP_HTTP_TRANSACTION_H_
 
 #include "net/base/completion_callback.h"
 #include "net/base/load_states.h"
 #include "net/base/net_export.h"
+#include "net/base/request_priority.h"
 #include "net/base/upload_progress.h"
 
 namespace net {
 
 class AuthCredentials;
 class BoundNetLog;
 struct HttpRequestInfo;
 class HttpResponseInfo;
 class IOBuffer;
 struct LoadTimingInfo;
@@ skipping 88 matching lines @@
   virtual LoadState GetLoadState() const = 0;
 
   // Returns the upload progress in bytes.  If there is no upload data,
   // zero will be returned.  This does not include the request headers.
   virtual UploadProgress GetUploadProgress() const = 0;
 
   // Populates all of load timing, except for request start times.
   // |load_timing_info| must have all null times when called.  Returns false and
   // does not modify |load_timing_info| if not currently connected.
   virtual bool GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const = 0;
+
+  // Called when the priority of the parent job changes.
+  virtual void SetPriority(RequestPriority priority) = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_TRANSACTION_H_