Revert of [chrome_elf] Big cleanup and removing dependencies that recently crept in. Part 1.

chrome_elf/chrome_elf_security.cc

 // Copyright 2013 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_elf/chrome_elf_security.h"
 
 #include <assert.h>
 #include <windows.h>
 #include <versionhelpers.h>  // windows.h must be before
 
 #include "chrome_elf/chrome_elf_constants.h"
 #include "chrome_elf/nt_registry/nt_registry.h"
 
-namespace elf_security {
-
 void EarlyBrowserSecurity() {
   typedef decltype(SetProcessMitigationPolicy)* SetProcessMitigationPolicyFunc;
 
   // This function is called from within DllMain.
   // Don't do anything naughty while we have the loader lock.
   NTSTATUS ret_val = STATUS_SUCCESS;
   HANDLE handle = INVALID_HANDLE_VALUE;
 
   // Check for kRegistrySecurityFinchPath.  If it exists,
   // we do NOT disable extension points.  (Emergency off flag.)
@@ skipping 16 matching lines @@
       // Disable extension points in this process.
       // (Legacy hooking.)
       PROCESS_MITIGATION_EXTENSION_POINT_DISABLE_POLICY policy = {};
       policy.DisableExtensionPoints = true;
       set_process_mitigation_policy(ProcessExtensionPointDisablePolicy, &policy,
                                     sizeof(policy));
     }
   }
   return;
 }
-}  // namespace elf_security