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

content/browser/browser_plugin/browser_plugin_message_filter.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/browser_plugin/browser_plugin_message_filter.h"
 
 #include "base/supports_user_data.h"
 #include "content/browser/browser_plugin/browser_plugin_guest.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/web_contents/web_contents_impl.h"
@@ skipping 13 matching lines @@
     : BrowserMessageFilter(BrowserPluginMsgStart),
       render_process_id_(render_process_id),
       is_guest_(is_guest) {
 }
 
 BrowserPluginMessageFilter::~BrowserPluginMessageFilter() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 }
 
 bool BrowserPluginMessageFilter::OnMessageReceived(
-    const IPC::Message& message,
-    bool* message_was_ok) {
+    const IPC::Message& message) {
   // Any message requested by a BrowserPluginGuest should be routed through
   // a BrowserPluginGuestManager.
   if (BrowserPluginGuest::ShouldForwardToBrowserPluginGuest(message)) {
     ForwardMessageToGuest(message);
     // We always swallow messages destined for BrowserPluginGuestManager because
     // we're on the UI thread and fallback code is expected to be run on the IO
     // thread.
     return true;
   }
   bool handled = true;
@@ skipping 51 matching lines @@
   if (!gpu_host)
     return;
   AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
   ack_params.mailbox = params.mailbox;
   ack_params.sync_point = params.sync_point;
   gpu_host->Send(new AcceleratedSurfaceMsg_BufferPresented(params.gpu_route_id,
                                                            ack_params));
 }
 
 } // namespace content