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

content/browser/frame_host/render_frame_message_filter.cc

 // 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.
 
 #include "content/browser/frame_host/render_frame_message_filter.h"
 
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/renderer_host/render_widget_helper.h"
 #include "content/common/frame_messages.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 21 matching lines @@
     int render_process_id,
     RenderWidgetHelper* render_widget_helper)
     : BrowserMessageFilter(FrameMsgStart),
       render_process_id_(render_process_id),
       render_widget_helper_(render_widget_helper) {
 }
 
 RenderFrameMessageFilter::~RenderFrameMessageFilter() {
 }
 
-bool RenderFrameMessageFilter::OnMessageReceived(const IPC::Message& message,
-                                                 bool* message_was_ok) {
+bool RenderFrameMessageFilter::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP_EX(RenderFrameMessageFilter, message, *message_was_ok)
+  IPC_BEGIN_MESSAGE_MAP(RenderFrameMessageFilter, message)
     IPC_MESSAGE_HANDLER(FrameHostMsg_CreateChildFrame, OnCreateChildFrame)
     IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP_EX()
+  IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void RenderFrameMessageFilter::OnCreateChildFrame(
     int parent_routing_id,
     const std::string& frame_name,
     int* new_routing_id) {
   *new_routing_id = render_widget_helper_->GetNextRoutingID();
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&CreateChildFrameOnUI, render_process_id_,
                  parent_routing_id, frame_name, *new_routing_id));
 }
 
 }  // namespace content