Replace template_util.h stuff with C++11 <type_traits>

sandbox/linux/services/namespace_utils.h

 // Copyright 2015 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.
 
 #ifndef SANDBOX_LINUX_SERVICES_NAMESPACE_UTILS_H_
 #define SANDBOX_LINUX_SERVICES_NAMESPACE_UTILS_H_
 
 #include <sys/types.h>
 
+#include <type_traits>
+
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/template_util.h"
 #include "sandbox/sandbox_export.h"
 
 namespace sandbox {
 
 // Utility functions for using Linux namepaces.
 class SANDBOX_EXPORT NamespaceUtils {
  public:
-  static_assert((base::is_same<uid_t, gid_t>::value),
+  static_assert(std::is_same<uid_t, gid_t>::value,
                 "uid_t and gid_t must be the same type");
   // generic_id_t can be used for either uid_t or gid_t.
   typedef uid_t generic_id_t;
 
   // Write a uid or gid mapping from |id| to |id| in |map_file|. This function
   // is async-signal-safe.
   static bool WriteToIdMapFile(const char* map_file,
                                generic_id_t id) WARN_UNUSED_RESULT;
 
   // Returns true if unprivileged namespaces of type |type| is supported
@@ skipping 14 matching lines @@
   // KernelSupportsDenySetgroups. This function is async-signal-safe.
   static bool DenySetgroups() WARN_UNUSED_RESULT;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(NamespaceUtils);
 };
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_LINUX_SERVICES_NAMESPACE_UTILS_H_