C++11: Use type aliases instead of typedefs

util/test/posix/close_multiple.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,
@@ skipping 54 matching lines @@
 struct ScopedDIRCloser {
   void operator()(DIR* dir) const {
     if (dir) {
       if (closedir(dir) < 0) {
         PLOG(ERROR) << "closedir";
       }
     }
   }
 };
 
-typedef scoped_ptr<DIR, ScopedDIRCloser> ScopedDIR;
+using ScopedDIR = scoped_ptr<DIR, ScopedDIRCloser>;
 
 // This function implements CloseMultipleNowOrOnExec() using an operating
 // system-specific FD directory to determine which file descriptors are open.
 // This is an advantage over looping over all possible file descriptors, because
 // no attempt needs to be made to close file descriptors that are not open.
 bool CloseMultipleNowOrOnExecUsingFDDir(int fd, int preserve_fd) {
 #if defined(OS_MACOSX)
   const char kFDDir[] = "/dev/fd";
 #elif defined(OS_LINUX)
   const char kFDDir[] = "/proc/self/fd";
@@ skipping 62 matching lines @@
   max_fd = std::max(max_fd, getdtablesize());
 
   for (int entry_fd = fd; entry_fd < max_fd; ++entry_fd) {
     if (entry_fd != preserve_fd) {
       CloseNowOrOnExec(entry_fd, true);
     }
   }
 }
 
 }  // namespace crashpad