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

components/nacl/browser/nacl_host_message_filter.h

 // Copyright 2013 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 COMPONENTS_NACL_BROWSER_NACL_HOST_MESSAGE_FILTER_H_
 #define COMPONENTS_NACL_BROWSER_NACL_HOST_MESSAGE_FILTER_H_
 
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 16 matching lines @@
 // This class filters out incoming Chrome-specific IPC messages for the renderer
 // process on the IPC thread.
 class NaClHostMessageFilter : public content::BrowserMessageFilter {
  public:
   NaClHostMessageFilter(int render_process_id,
                         bool is_off_the_record,
                         const base::FilePath& profile_directory,
                         net::URLRequestContextGetter* request_context);
 
   // content::BrowserMessageFilter methods:
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OnChannelClosing() OVERRIDE;
 
   int render_process_id() { return render_process_id_; }
   bool off_the_record() { return off_the_record_; }
   const base::FilePath& profile_directory() const { return profile_directory_; }
   net::HostResolver* GetHostResolver();
 
  private:
   friend class content::BrowserThread;
   friend class base::DeleteHelper<NaClHostMessageFilter>;
@@ skipping 30 matching lines @@
   scoped_refptr<net::URLRequestContextGetter> request_context_;
 
   base::WeakPtrFactory<NaClHostMessageFilter> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClHostMessageFilter);
 };
 
 }  // namespace nacl
 
 #endif  // COMPONENTS_NACL_BROWSER_NACL_HOST_MESSAGE_FILTER_H_