Remove IPC_BEGIN_MESSAGE_MAP_EX macro since r270839 made all bad IPCs kill their child processes.

content/browser/worker_host/worker_process_host.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 "content/browser/worker_host/worker_process_host.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 373 matching lines @@
     IPC_MESSAGE_HANDLER(WorkerHostMsg_WorkerScriptLoadFailed,
                         OnWorkerScriptLoadFailed)
     IPC_MESSAGE_HANDLER(WorkerHostMsg_WorkerConnected,
                         OnWorkerConnected)
     IPC_MESSAGE_HANDLER(WorkerProcessHostMsg_AllowDatabase, OnAllowDatabase)
     IPC_MESSAGE_HANDLER(WorkerProcessHostMsg_AllowFileSystem, OnAllowFileSystem)
     IPC_MESSAGE_HANDLER(WorkerProcessHostMsg_AllowIndexedDB, OnAllowIndexedDB)
     IPC_MESSAGE_HANDLER(WorkerProcessHostMsg_ForceKillWorker,
                         OnForceKillWorkerProcess)
     IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP_EX()
+  IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 // Sent to notify the browser process when a worker context invokes close(), so
 // no new connections are sent to shared workers.
 void WorkerProcessHost::OnWorkerContextClosed(int worker_route_id) {
   for (Instances::iterator i = instances_.begin(); i != instances_.end(); ++i) {
     if (i->worker_route_id() == worker_route_id) {
       // Set the closed flag - this will stop any further messages from
@@ skipping 415 matching lines @@
   return false;
 }
 
 WorkerProcessHost::WorkerInstance::FilterInfo
 WorkerProcessHost::WorkerInstance::GetFilter() const {
   DCHECK(NumFilters() == 1);
   return *filters_.begin();
 }
 
 }  // namespace content