Close DeviceApi in Win8+ lockdown

content/common/sandbox_win.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 "content/common/sandbox_win.h"
 
 #include <string>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
@@ skipping 325 matching lines @@
 
 bool AddPolicyForSandboxedProcess(sandbox::TargetPolicy* policy) {
   sandbox::ResultCode result;
   // Renderers need to share events with plugins.
   result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES,
                            sandbox::TargetPolicy::HANDLES_DUP_ANY,
                            L"Event");
   if (result != sandbox::SBOX_ALL_OK)
     return false;
 
+  // Win8+ adds a device DeviceApi that we don't need.
+  if (base::win::GetVersion() > base::win::VERSION_WIN7)
+    policy->AddKernelObjectToClose(L"File", L"\\Device\\DeviceApi");
+
   sandbox::TokenLevel initial_token = sandbox::USER_UNPROTECTED;
   if (base::win::GetVersion() > base::win::VERSION_XP) {
     // On 2003/Vista the initial token has to be restricted if the main
     // token is restricted.
     initial_token = sandbox::USER_RESTRICTED_SAME_ACCESS;
   }
 
   policy->SetTokenLevel(initial_token, sandbox::USER_LOCKDOWN);
   // Prevents the renderers from manipulating low-integrity processes.
   policy->SetDelayedIntegrityLevel(sandbox::INTEGRITY_LEVEL_UNTRUSTED);
@@ skipping 374 matching lines @@
   }
 
   return false;
 }
 
 bool BrokerAddTargetPeer(HANDLE peer_process) {
   return g_broker_services->AddTargetPeer(peer_process) == sandbox::SBOX_ALL_OK;
 }
 
 }  // namespace content