Update from https://crrev.com/307664

third_party/protobuf/src/google/protobuf/stubs/once.cc

Index: third_party/protobuf/src/google/protobuf/stubs/once.cc
diff --git a/third_party/protobuf/src/google/protobuf/stubs/once.cc b/third_party/protobuf/src/google/protobuf/stubs/once.cc
index 1e24b85526705c0e1b31b1fa6109c66493bc18d6..2363622e330e344bcf9983497a6f7da65947ebe9 100644
--- a/third_party/protobuf/src/google/protobuf/stubs/once.cc
+++ b/third_party/protobuf/src/google/protobuf/stubs/once.cc
@@ -93,6 +93,13 @@ void GoogleOnceInitImpl(ProtobufOnceType* once, Closure* closure) {
   }
 }
 
+void GoogleOnceInit(ProtobufOnceType* once, void (*init_func)()) {
+  if (internal::Acquire_Load(once) != ONCE_STATE_DONE) {
+    internal::FunctionClosure0 func(init_func, false);
+    GoogleOnceInitImpl(once, &func);
+  }
+}
+
 }  // namespace protobuf
 }  // namespace google