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

third_party/crashpad/crashpad/compat/non_cxx11_lib/type_traits

 // Copyright 2015 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 12 matching lines @@
 
 #else
 
 namespace std {
 
 template <class T>
 struct remove_reference { using type = T; };
 template <class T>
 struct remove_reference<T&> { using type = T; };
 
+template <typename T, typename S>
+struct is_same { enum { value = false }; };
+template <typename T>
+struct is_same<T, T> { enum { value = true }; };
+
 }  // namespace std
 
 #endif  // CXX_LIBRARY_VERSION
 
 #endif  // CRASHPAD_COMPAT_NON_CXX11_LIB_TYPE_TRAITS_