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

content/browser/renderer_host/gpu_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.
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include "content/browser/renderer_host/gpu_message_filter.h"
 
@@ skipping 49 matching lines @@
       render_widget_helper_(render_widget_helper),
       weak_ptr_factory_(this) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 }
 
 GpuMessageFilter::~GpuMessageFilter() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   EndAllFrameSubscriptions();
 }
 
-bool GpuMessageFilter::OnMessageReceived(
-    const IPC::Message& message,
-    bool* message_was_ok) {
+bool GpuMessageFilter::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP_EX(GpuMessageFilter, message, *message_was_ok)
+  IPC_BEGIN_MESSAGE_MAP(GpuMessageFilter, message)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuHostMsg_EstablishGpuChannel,
                                     OnEstablishGpuChannel)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuHostMsg_CreateViewCommandBuffer,
                                     OnCreateViewCommandBuffer)
     IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP_EX()
+  IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void GpuMessageFilter::BeginFrameSubscription(
     int route_id,
     scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   linked_ptr<FrameSubscription> subscription(
       new FrameSubscription(route_id, subscriber.Pass()));
   BeginFrameSubscriptionInternal(subscription);
@@ skipping 167 matching lines @@
   // so it is not necessary to end it.
   if (!host || !subscription->surface_id)
     return;
 
   // Note that GpuProcessHost here might not be the same one that frame
   // subscription has applied.
   host->EndFrameSubscription(subscription->surface_id);
 }
 
 }  // namespace content