Update from https://crrev.com/316786

base/process/process_handle_win.cc

 // Copyright (c) 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 "base/process/process_handle.h"
 
 #include <windows.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/win/scoped_handle.h"
 #include "base/win/windows_version.h"
 
 namespace base {
 
 ProcessId GetCurrentProcId() {
   return ::GetCurrentProcessId();
 }
 
 ProcessHandle GetCurrentProcessHandle() {
   return ::GetCurrentProcess();
 }
 
-void CloseProcessHandle(ProcessHandle process) {
-  CloseHandle(process);
-}
-
 ProcessId GetProcId(ProcessHandle process) {
   // This returns 0 if we have insufficient rights to query the process handle.
   return GetProcessId(process);
 }
 
-bool GetProcessIntegrityLevel(ProcessHandle process, IntegrityLevel *level) {
-  if (!level)
-    return false;
-
-  if (win::GetVersion() < base::win::VERSION_VISTA)
-    return false;
-
-  HANDLE process_token;
-  if (!OpenProcessToken(process, TOKEN_QUERY | TOKEN_QUERY_SOURCE,
-      &process_token))
-    return false;
-
-  win::ScopedHandle scoped_process_token(process_token);
-
-  DWORD token_info_length = 0;
-  if (GetTokenInformation(process_token, TokenIntegrityLevel, NULL, 0,
-                          &token_info_length) ||
-      GetLastError() != ERROR_INSUFFICIENT_BUFFER)
-    return false;
-
-  scoped_ptr<char[]> token_label_bytes(new char[token_info_length]);
-  if (!token_label_bytes.get())
-    return false;
-
-  TOKEN_MANDATORY_LABEL* token_label =
-      reinterpret_cast<TOKEN_MANDATORY_LABEL*>(token_label_bytes.get());
-  if (!token_label)
-    return false;
-
-  if (!GetTokenInformation(process_token, TokenIntegrityLevel, token_label,
-                           token_info_length, &token_info_length))
-    return false;
-
-  DWORD integrity_level = *GetSidSubAuthority(token_label->Label.Sid,
-      (DWORD)(UCHAR)(*GetSidSubAuthorityCount(token_label->Label.Sid)-1));
-
-  if (integrity_level < SECURITY_MANDATORY_MEDIUM_RID) {
-    *level = LOW_INTEGRITY;
-  } else if (integrity_level >= SECURITY_MANDATORY_MEDIUM_RID &&
-      integrity_level < SECURITY_MANDATORY_HIGH_RID) {
-    *level = MEDIUM_INTEGRITY;
-  } else if (integrity_level >= SECURITY_MANDATORY_HIGH_RID) {
-    *level = HIGH_INTEGRITY;
-  } else {
-    NOTREACHED();
-    return false;
-  }
-
-  return true;
-}
-
 }  // namespace base