Sandbox: Make CreateRestrictedToken return a ScopedHandle.

sandbox/win/tools/finder/finder.cc

 // Copyright (c) 2006-2008 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 "sandbox/win/src/restricted_token.h"
 #include "sandbox/win/src/restricted_token_utils.h"
 #include "sandbox/win/tools/finder/finder.h"
 
 Finder::Finder() {
   file_output_ = NULL;
   object_type_ = 0;
   access_type_ = 0;
-  token_handle_ = NULL;
   memset(filesystem_stats_, 0, sizeof(filesystem_stats_));
   memset(registry_stats_, 0, sizeof(registry_stats_));
   memset(kernel_object_stats_, 0, sizeof(kernel_object_stats_));
 }
 
 Finder::~Finder() {
-  if (token_handle_)
-    ::CloseHandle(token_handle_);
 }
 
 DWORD Finder::Init(sandbox::TokenLevel token_type,
                    DWORD object_type,
                    DWORD access_type,
                    FILE *file_output) {
   DWORD err_code = ERROR_SUCCESS;
 
   err_code = InitNT();
   if (ERROR_SUCCESS != err_code)
     return err_code;
 
   object_type_ = object_type;
   access_type_ = access_type;
   file_output_ = file_output;
 
   err_code = sandbox::CreateRestrictedToken(&token_handle_, token_type,
                                             sandbox::INTEGRITY_LEVEL_LAST,
                                             sandbox::PRIMARY);
   return err_code;
 }
 
 DWORD Finder::Scan() {
-  if (!token_handle_) {
+  if (!token_handle_.IsValid()) {
     return ERROR_NO_TOKEN;
   }
 
   if (object_type_ & kScanRegistry) {
     ParseRegistry(HKEY_LOCAL_MACHINE, L"HKLM\\");
     ParseRegistry(HKEY_USERS, L"HKU\\");
     ParseRegistry(HKEY_CURRENT_CONFIG, L"HKCC\\");
   }
 
   if (object_type_ & kScanFileSystem) {
     ParseFileSystem(L"\\\\?\\C:");
   }
 
   if (object_type_ & kScanKernelObjects) {
     ParseKernelObjects(L"\\");
   }
 
   return ERROR_SUCCESS;
 }