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

content/browser/vibration/vibration_message_filter.h

Index: content/browser/vibration/vibration_message_filter.h
===================================================================
--- content/browser/vibration/vibration_message_filter.h	(revision 271040)
+++ content/browser/vibration/vibration_message_filter.h	(working copy)
@@ -19,8 +19,7 @@
  private:
   virtual ~VibrationMessageFilter();
   // BrowserMessageFilter implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   void OnVibrate(int64 milliseconds);
   void OnCancelVibration();