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

content/browser/renderer_host/media/peer_connection_tracker_host.cc

 // Copyright (c) 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.
 #include "content/browser/renderer_host/media/peer_connection_tracker_host.h"
 
 #include "content/browser/media/webrtc_internals.h"
 #include "content/common/media/peer_connection_tracker_messages.h"
 
 namespace content {
 
 PeerConnectionTrackerHost::PeerConnectionTrackerHost(int render_process_id)
     : BrowserMessageFilter(PeerConnectionTrackerMsgStart),
       render_process_id_(render_process_id) {}
 
-bool PeerConnectionTrackerHost::OnMessageReceived(const IPC::Message& message,
-                                                  bool* message_was_ok) {
+bool PeerConnectionTrackerHost::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
 
-  IPC_BEGIN_MESSAGE_MAP_EX(PeerConnectionTrackerHost, message, *message_was_ok)
+  IPC_BEGIN_MESSAGE_MAP(PeerConnectionTrackerHost, message)
     IPC_MESSAGE_HANDLER(PeerConnectionTrackerHost_AddPeerConnection,
                         OnAddPeerConnection)
     IPC_MESSAGE_HANDLER(PeerConnectionTrackerHost_RemovePeerConnection,
                         OnRemovePeerConnection)
     IPC_MESSAGE_HANDLER(PeerConnectionTrackerHost_UpdatePeerConnection,
                         OnUpdatePeerConnection)
     IPC_MESSAGE_HANDLER(PeerConnectionTrackerHost_AddStats, OnAddStats)
     IPC_MESSAGE_HANDLER(PeerConnectionTrackerHost_GetUserMedia, OnGetUserMedia)
     IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP_EX()
+  IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void PeerConnectionTrackerHost::OverrideThreadForMessage(
     const IPC::Message& message, BrowserThread::ID* thread) {
   if (IPC_MESSAGE_CLASS(message) == PeerConnectionTrackerMsgStart)
     *thread = BrowserThread::UI;
 }
 
 PeerConnectionTrackerHost::~PeerConnectionTrackerHost() {
@@ skipping 37 matching lines @@
   WebRTCInternals::GetInstance()->OnGetUserMedia(render_process_id_,
                                                  peer_pid(),
                                                  origin,
                                                  audio,
                                                  video,
                                                  audio_constraints,
                                                  video_constraints);
 }
 
 }  // namespace content