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

base/android/jni_android.cc

Index: base/android/jni_android.cc
diff --git a/base/android/jni_android.cc b/base/android/jni_android.cc
index a746fd4e47389586a4876b795ab84bad6cf533fb..d29cffe35fe55d6242f57ef09618e0d0dc784034 100644
--- a/base/android/jni_android.cc
+++ b/base/android/jni_android.cc
@@ -40,7 +40,7 @@ struct MethodIdentifier {
 };
 
 typedef std::map<MethodIdentifier, jmethodID> MethodIDMap;
-base::LazyInstance<MethodIDMap, base::LeakyLazyInstanceTraits<MethodIDMap> >
+base::LazyInstance<MethodIDMap>::Leaky
     g_method_id_map = LAZY_INSTANCE_INITIALIZER;
 const base::subtle::AtomicWord kUnlocked = 0;
 const base::subtle::AtomicWord kLocked = 1;