[Net] Propagate priority changes from URLRequest to HttpTransaction

net/url_request/url_request_job.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_URL_REQUEST_URL_REQUEST_JOB_H_
 #define NET_URL_REQUEST_URL_REQUEST_JOB_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/system_monitor/system_monitor.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/filter.h"
 #include "net/base/host_port_pair.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"
 #include "net/cookies/canonical_cookie.h"
 
 namespace net {
 
 class AuthChallengeInfo;
 class AuthCredentials;
 class CookieOptions;
 class HttpRequestHeaders;
 class HttpResponseInfo;
@@ skipping 16 matching lines @@
   // Returns the request that owns this job. THIS POINTER MAY BE NULL if the
   // request was destroyed.
   URLRequest* request() const {
     return request_;
   }
 
   // Sets the upload data, most requests have no upload data, so this is a NOP.
   // Job types supporting upload data will override this.
   virtual void SetUpload(UploadDataStream* upload_data_stream);
 
-  // Sets extra request headers for Job types that support request headers.
+  // Sets extra request headers for Job types that support request
+  // headers. Called once before Start() is called.
   virtual void SetExtraRequestHeaders(const HttpRequestHeaders& headers);
 
+  // Sets the priority of the job. Called once before Start() is
+  // called, but also when the priority of the parent request changes.
+  virtual void SetPriority(RequestPriority priority);
+
   // If any error occurs while starting the Job, NotifyStartError should be
   // called.
   // This helps ensure that all errors follow more similar notification code
   // paths, which should simplify testing.
   virtual void Start() = 0;
 
   // This function MUST somehow call NotifyDone/NotifyCanceled or some requests
   // will get leaked. Certain callers use that message to know when they can
   // delete their URLRequest object, even when doing a cancel. The default
   // Kill implementation calls NotifyCanceled, so it is recommended that
@@ skipping 317 matching lines @@
   NetworkDelegate* network_delegate_;
 
   base::WeakPtrFactory<URLRequestJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestJob);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_JOB_H_