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

chrome/browser/printing/printing_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 "chrome/browser/printing/printing_message_filter.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 97 matching lines @@
     *thread = BrowserThread::FILE;
   }
 #elif defined(OS_ANDROID)
   if (message.type() == PrintHostMsg_AllocateTempFileForPrinting::ID ||
       message.type() == PrintHostMsg_TempFileForPrintingWritten::ID) {
     *thread = BrowserThread::UI;
   }
 #endif
 }
 
-bool PrintingMessageFilter::OnMessageReceived(const IPC::Message& message,
-                                              bool* message_was_ok) {
+bool PrintingMessageFilter::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP_EX(PrintingMessageFilter, message, *message_was_ok)
+  IPC_BEGIN_MESSAGE_MAP(PrintingMessageFilter, message)
 #if defined(OS_WIN)
     IPC_MESSAGE_HANDLER(PrintHostMsg_DuplicateSection, OnDuplicateSection)
 #endif
 #if defined(OS_CHROMEOS) || defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(PrintHostMsg_AllocateTempFileForPrinting,
                         OnAllocateTempFileForPrinting)
     IPC_MESSAGE_HANDLER(PrintHostMsg_TempFileForPrintingWritten,
                         OnTempFileForPrintingWritten)
 #endif
     IPC_MESSAGE_HANDLER(PrintHostMsg_IsPrintingEnabled, OnIsPrintingEnabled)
@@ skipping 338 matching lines @@
 
 #if defined(ENABLE_FULL_PRINTING)
 void PrintingMessageFilter::OnCheckForCancel(int32 preview_ui_id,
                                              int preview_request_id,
                                              bool* cancel) {
   PrintPreviewUI::GetCurrentPrintPreviewStatus(preview_ui_id,
                                                preview_request_id,
                                                cancel);
 }
 #endif