Add a convenience typedef LazyInstance<T>::Leaky to avoid repeating T.

net/base/dns_reloader.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/base/dns_reloader.h"
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_OPENBSD) && \
     !defined(OS_ANDROID)
 
 #include <resolv.h>
@@ skipping 85 matching lines @@
   static base::ThreadLocalStorage::Slot tls_index_ ;
 
   DISALLOW_COPY_AND_ASSIGN(DnsReloader);
 };
 
 // A TLS slot to the ReloadState for the current thread.
 // static
 base::ThreadLocalStorage::Slot DnsReloader::tls_index_(
     base::LINKER_INITIALIZED);
 
-base::LazyInstance<DnsReloader,
-                   base::LeakyLazyInstanceTraits<DnsReloader> >
+base::LazyInstance<DnsReloader>::Leaky
     g_dns_reloader = LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
 namespace net {
 
 void EnsureDnsReloaderInit() {
   DnsReloader* t ALLOW_UNUSED = g_dns_reloader.Pointer();
 }
 
 void DnsReloaderMaybeReload() {
   // This routine can be called by any of the DNS worker threads.
   DnsReloader* dns_reloader = g_dns_reloader.Pointer();
   dns_reloader->MaybeReload();
 }
 
 }  // namespace net
 
 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_OPENBSD) &&
         // !defined(OS_ANDROID)