C++11: Use type aliases instead of typedefs

client/simple_string_dictionary.h

 // 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,
@@ skipping 249 matching lines @@
     return const_cast<Entry*>(GetConstEntryForKey(key));
   }
 
   Entry entries_[NumEntries];
 };
 
 //! \brief A TSimpleStringDictionary with default template parameters.
 //!
 //! For historical reasons this specialized version is available with the same
 //! size factors as a previous implementation.
-typedef TSimpleStringDictionary<256, 256, 64> SimpleStringDictionary;
+using SimpleStringDictionary = TSimpleStringDictionary<256, 256, 64>;
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_CLIENT_SIMPLE_STRING_DICTIONARY_H_