Revert https://src.chromium.org/viewvc/chrome?view=rev&revision=231330

ipc/ipc_sync_message.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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 #include <stack>
@@ skipping 21 matching lines @@
 
 }  // namespace
 
 namespace IPC {
 
 #define kSyncMessageHeaderSize 4
 
 SyncMessage::SyncMessage(
     int32 routing_id,
     uint32 type,
+    PriorityValue priority,
     MessageReplyDeserializer* deserializer)
-    : Message(routing_id, type),
+    : Message(routing_id, type, priority),
       deserializer_(deserializer),
       pump_messages_event_(NULL)
       {
   set_sync();
   set_unblock(true);
 
   // Add synchronous message data before the message payload.
   SyncHeader header;
   header.message_id = g_next_id.GetNext();
   WriteSyncHeader(this, header);
@@ skipping 34 matching lines @@
   SyncHeader header;
   if (!ReadSyncHeader(msg, &header))
     return 0;
 
   return header.message_id;
 }
 
 Message* SyncMessage::GenerateReply(const Message* msg) {
   DCHECK(msg->is_sync());
 
-  Message* reply = new Message(msg->routing_id(), IPC_REPLY_ID);
+  Message* reply = new Message(msg->routing_id(), IPC_REPLY_ID,
+                               msg->priority());
   reply->set_reply();
 
   SyncHeader header;
 
   // use the same message id, but this time reply bit is set
   header.message_id = GetMessageId(*msg);
   WriteSyncHeader(reply, header);
 
   return reply;
 }
@@ skipping 25 matching lines @@
 
   return true;
 }
 
 
 bool MessageReplyDeserializer::SerializeOutputParameters(const Message& msg) {
   return SerializeOutputParameters(msg, SyncMessage::GetDataIterator(&msg));
 }
 
 }  // namespace IPC