[Net] Propagate priority changes from HttpNetworkTransaction to its request

net/http/http_network_transaction.cc

 // 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.
 
 #include "net/http/http_network_transaction.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 401 matching lines @@
   load_timing_info->proxy_resolve_start =
       proxy_info_.proxy_resolve_start_time();
   load_timing_info->proxy_resolve_end = proxy_info_.proxy_resolve_end_time();
   load_timing_info->send_start = send_start_time_;
   load_timing_info->send_end = send_end_time_;
   return true;
 }
 
 void HttpNetworkTransaction::SetPriority(RequestPriority priority) {
   priority_ = priority;
-  // TODO(akalin): Plumb this through to |stream_request_| and
-  // |stream_|.
+  if (stream_request_)
+    stream_request_->SetPriority(priority);
+  // TODO(akalin): Plumb this through to |stream_| also.
 }
 
 void HttpNetworkTransaction::OnStreamReady(const SSLConfig& used_ssl_config,
                                            const ProxyInfo& used_proxy_info,
                                            HttpStreamBase* stream) {
   DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);
   DCHECK(stream_request_.get());
 
   stream_.reset(stream);
   server_ssl_config_ = used_ssl_config;
@@ skipping 1043 matching lines @@
       description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
                                        state);
       break;
   }
   return description;
 }
 
 #undef STATE_CASE
 
 }  // namespace net