Bug 1329334 - Variant::as<> should use MOZ_RELEASE_ASSERT. r=froydnj

MozReview-Commit-ID: E95959RYm2r

--HG--
extra : rebase_source : 774fcf05c3e6baf080a0e74358e7441242465bb4

mfbt/Variant.h

@@ -575,7 +575,7 @@ public:
   T& as() {
     static_assert(detail::IsVariant<T, Ts...>::value,
                   "provided a type not found in this Variant's type list");
-    MOZ_ASSERT(is<T>());
+    MOZ_RELEASE_ASSERT(is<T>());
     return *reinterpret_cast<T*>(&raw);
   }
 
@@ -584,7 +584,7 @@ public:
   const T& as() const {
     static_assert(detail::IsVariant<T, Ts...>::value,
                   "provided a type not found in this Variant's type list");
-    MOZ_ASSERT(is<T>());
+    MOZ_RELEASE_ASSERT(is<T>());
     return *reinterpret_cast<const T*>(&raw);
   }