Don't attempt to remove IAT patches at process end.

chrome/app/close_handle_hook_win.cc

 // Copyright 2014 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/app/close_handle_hook_win.h"
 
 #include <Windows.h>
 #include <psapi.h>
 
 #include <vector>
@@ skipping 200 matching lines @@
     // Performing EAT interception first is safer in the presence of other
     // threads attempting to call CloseHandle.
     hooks->AddEATPatch();
     PatchLoadedModules(hooks);
   } else {
     base::win::DisableHandleVerifier();
   }
 }
 
 void RemoveCloseHandleHooks() {
-  g_hooks.Get().Unpatch();
 }