C++11: Use type aliases instead of typedefs

client/simple_string_dictionary.cc

 // Copyright 2014 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,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include "client/simple_string_dictionary.h"
 
 #include "util/stdlib/cxx.h"
 
 #if CXX_LIBRARY_VERSION >= 2011
 #include <type_traits>
 #endif
 
 namespace crashpad {
 namespace {
 
-typedef TSimpleStringDictionary<1, 1, 1> SimpleStringDictionaryForAssertion;
+using SimpleStringDictionaryForAssertion = TSimpleStringDictionary<1, 1, 1>;
 
 #if CXX_LIBRARY_VERSION >= 2011
 // In C++11, check that TSimpleStringDictionary has standard layout, which is
 // what is actually important.
 static_assert(
     std::is_standard_layout<SimpleStringDictionaryForAssertion>::value,
     "SimpleStringDictionary must be standard layout");
 #else
 // In C++98 (ISO 14882), section 9.5.1 says that a union cannot have a member
 // with a non-trivial ctor, copy ctor, dtor, or assignment operator. Use this
 // property to ensure that Entry remains POD. This doesn’t work for C++11
 // because the requirements for unions have been relaxed.
 union Compile_Assert {
   SimpleStringDictionaryForAssertion::Entry Compile_Assert__entry_must_be_pod;
 };
 #endif
 
 }  // namespace
 }  // namespace crashpad