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

crypto/nss_util.cc

Index: crypto/nss_util.cc
diff --git a/crypto/nss_util.cc b/crypto/nss_util.cc
index 2540c0c226ee4398b2d2680c376b0e9708f9f97c..65b830d6415577412cb0a6bab870d2e43a853f8b 100644
--- a/crypto/nss_util.cc
+++ b/crypto/nss_util.cc
@@ -217,8 +217,7 @@ class NSPRInitSingleton {
   }
 };
 
-base::LazyInstance<NSPRInitSingleton,
-                   base::LeakyLazyInstanceTraits<NSPRInitSingleton> >
+base::LazyInstance<NSPRInitSingleton>::Leaky
     g_nspr_singleton = LAZY_INSTANCE_INITIALIZER;
 
 class NSSInitSingleton {
@@ -612,8 +611,7 @@ class NSSInitSingleton {
 // static
 bool NSSInitSingleton::force_nodb_init_ = false;
 
-base::LazyInstance<NSSInitSingleton,
-                   base::LeakyLazyInstanceTraits<NSSInitSingleton> >
+base::LazyInstance<NSSInitSingleton>::Leaky
     g_nss_singleton = LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace