Cleanup/Remove Windows XP/Vista version checks from Windows sandbox code

sandbox/win/src/policy_broker.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 <stddef.h>
 
 #include <map>
 
 #include "sandbox/win/src/policy_broker.h"
 
@@ skipping 92 matching lines @@
       !INTERCEPT_NT(manager, NtOpenProcess, OPEN_PROCESS_ID, 20) ||
       !INTERCEPT_NT(manager, NtOpenProcessToken, OPEN_PROCESS_TOKEN_ID, 16))
     return false;
 
   // Interceptions with neither policy nor IPC.
   if (!INTERCEPT_NT(manager, NtSetInformationThread, SET_INFORMATION_THREAD_ID,
                     20) ||
       !INTERCEPT_NT(manager, NtOpenThreadToken, OPEN_THREAD_TOKEN_ID, 20))
     return false;
 
-  if (base::win::GetVersion() >= base::win::VERSION_XP) {
-    // Bug 27218: We don't have dispatch for some x64 syscalls.
-    // This one is also provided by process_thread_policy.
-    if (!INTERCEPT_NT(manager, NtOpenProcessTokenEx, OPEN_PROCESS_TOKEN_EX_ID,
-                      20))
-      return false;
+  // This one is also provided by process_thread_policy.
+  if (!INTERCEPT_NT(manager, NtOpenProcessTokenEx, OPEN_PROCESS_TOKEN_EX_ID,
+                    20))
+    return false;
 
-    if (!INTERCEPT_NT(manager, NtOpenThreadTokenEx, OPEN_THREAD_TOKEN_EX_ID,
-                      24))
-      return false;
-  }
+  if (!INTERCEPT_NT(manager, NtOpenThreadTokenEx, OPEN_THREAD_TOKEN_EX_ID,
+                    24))
+    return false;
 
   if (!is_csrss_connected) {
     if (!INTERCEPT_EAT(manager, kKerneldllName, CreateThread, CREATE_THREAD_ID,
                        28))
       return false;
   }
 
   return true;
 }
 
 }  // namespace sandbox