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

chrome/browser/spellchecker/spellcheck_message_filter.cc

Index: chrome/browser/spellchecker/spellcheck_message_filter.cc
===================================================================
--- chrome/browser/spellchecker/spellcheck_message_filter.cc	(revision 271040)
+++ chrome/browser/spellchecker/spellcheck_message_filter.cc	(working copy)
@@ -43,10 +43,9 @@
 #endif
 }
 
-bool SpellCheckMessageFilter::OnMessageReceived(const IPC::Message& message,
-                                                bool* message_was_ok) {
+bool SpellCheckMessageFilter::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP_EX(SpellCheckMessageFilter, message, *message_was_ok)
+  IPC_BEGIN_MESSAGE_MAP(SpellCheckMessageFilter, message)
     IPC_MESSAGE_HANDLER(SpellCheckHostMsg_RequestDictionary,
                         OnSpellCheckerRequestDictionary)
     IPC_MESSAGE_HANDLER(SpellCheckHostMsg_NotifyChecked,