C++11: Use type aliases instead of typedefs

util/file/fd_io.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 "util/file/fd_io.h"
 
 #include <unistd.h>
 
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/posix/eintr_wrapper.h"
 
 namespace {
 
 struct ReadTraits {
-  typedef void* VoidBufferType;
-  typedef char* CharBufferType;
+  using VoidBufferType = void*;
+  using CharBufferType = char*;
   static ssize_t Operate(int fd, CharBufferType buffer, size_t size) {
     return read(fd, buffer, size);
   }
 };
 
 struct WriteTraits {
-  typedef const void* VoidBufferType;
-  typedef const char* CharBufferType;
+  using VoidBufferType = const void*;
+  using CharBufferType = const char*;
   static ssize_t Operate(int fd, CharBufferType buffer, size_t size) {
     return write(fd, buffer, size);
   }
 };
 
 template <typename Traits>
 ssize_t ReadOrWrite(int fd,
                     typename Traits::VoidBufferType buffer,
                     size_t size) {
   typename Traits::CharBufferType buffer_c =
@@ skipping 58 matching lines @@
   }
 }
 
 bool LoggingCloseFD(int fd) {
   int rv = IGNORE_EINTR(close(fd));
   PLOG_IF(ERROR, rv != 0) << "close";
   return rv == 0;
 }
 
 }  // namespace crashpad