[Net] Propagate priority changes from URLRequest to HttpTransaction

net/base/net_log_event_type_list.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.
 
 // NOTE: No header guards are used, since this file is intended to be expanded
 // directly into net_log.h. DO NOT include this file anywhere else.
 
 // In the event of a failure, a many end events will have a |net_error|
 // parameter with the integer error code associated with the failure.  Most
 // of these parameters are not individually documented.
@@ skipping 713 matching lines @@
 // The filtered event is used when the bytes were passed through a filter before
 // being read.  This event is only present when byte logging is enabled.
 // The following parameters are attached:
 //   {
 //     "byte_count": <Number of bytes that were just sent>,
 //     "hex_encoded_bytes": <The exact bytes sent, as a hexadecimal string>,
 //   }
 EVENT_TYPE(URL_REQUEST_JOB_BYTES_READ)
 EVENT_TYPE(URL_REQUEST_JOB_FILTERED_BYTES_READ)
 
+// This event is sent when the priority of a net::URLRequest is
+// changed after it has started. The parameters attached to this event
+// are:
+//   {
+//     "priority": <Numerical value of the priority (higher is more important)>,
+//   }
+EVENT_TYPE(URL_REQUEST_SET_PRIORITY)
+
 // ------------------------------------------------------------------------
 // HttpCache
 // ------------------------------------------------------------------------
 
 // Measures the time while getting a reference to the back end.
 EVENT_TYPE(HTTP_CACHE_GET_BACKEND)
 
 // Measures the time while opening a disk cache entry.
 EVENT_TYPE(HTTP_CACHE_OPEN_ENTRY)
 
@@ skipping 1161 matching lines @@
 //   }
 EVENT_TYPE(FTP_DATA_CONNECTION)
 
 // This event is created when FTP control connection response is processed.
 // It contains following parameters:
 //   {
 //     "lines": <list of strings - each representing a line of the response>
 //     "status_code": <numeric status code of the response>
 //   }
 EVENT_TYPE(FTP_CONTROL_RESPONSE)