Fixes for re-enabling more MSVC level 4 warnings: content/ edition

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 413 matching lines @@
   OBJECT_BASIC_INFORMATION basic_info;
   size = sizeof(basic_info);
   error = g_QueryObject(handle, ObjectBasicInformation, &basic_info, size,
                         &size);
   CHECK(NT_SUCCESS(error));
 
   CHECK(!(basic_info.GrantedAccess & WRITE_DAC)) <<
       kDuplicateHandleWarning;
 
   if (0 == _wcsicmp(type_info->Name.Buffer, L"Process")) {
-    const ACCESS_MASK kDangerousMask = ~(PROCESS_QUERY_LIMITED_INFORMATION |
-                                         SYNCHRONIZE);
+    const ACCESS_MASK kDangerousMask =
+        ~static_cast<DWORD>(PROCESS_QUERY_LIMITED_INFORMATION | SYNCHRONIZE);
     CHECK(!(basic_info.GrantedAccess & kDangerousMask)) <<
         kDuplicateHandleWarning;
   }
 }
 
 BOOL WINAPI DuplicateHandlePatch(HANDLE source_process_handle,
                                  HANDLE source_handle,
                                  HANDLE target_process_handle,
                                  LPHANDLE target_handle,
                                  DWORD desired_access,
@@ skipping 328 matching lines @@
   }
 
   return false;
 }
 
 bool BrokerAddTargetPeer(HANDLE peer_process) {
   return g_broker_services->AddTargetPeer(peer_process) == sandbox::SBOX_ALL_OK;
 }
 
 }  // namespace content