Update third_party/protobuf to protobuf-v3.0.0-beta-3

third_party/protobuf/ruby/ext/google/protobuf_c/defs.c

Index: third_party/protobuf/ruby/ext/google/protobuf_c/defs.c
diff --git a/third_party/protobuf/ruby/ext/google/protobuf_c/defs.c b/third_party/protobuf/ruby/ext/google/protobuf_c/defs.c
index 7e0cd14cef0a8f6ee1df3380cc5187658af27223..7e93bafb33c4a3b15746491d74f9163a049e2728 100644
--- a/third_party/protobuf/ruby/ext/google/protobuf_c/defs.c
+++ b/third_party/protobuf/ruby/ext/google/protobuf_c/defs.c
@@ -243,6 +243,10 @@ void Descriptor_free(void* _self) {
   if (self->fill_method) {
     upb_pbdecodermethod_unref(self->fill_method, &self->fill_method);
   }
+  if (self->json_fill_method) {
+    upb_json_parsermethod_unref(self->json_fill_method,
+                                &self->json_fill_method);
+  }
   if (self->pb_serialize_handlers) {
     upb_handlers_unref(self->pb_serialize_handlers,
                        &self->pb_serialize_handlers);
@@ -251,6 +255,10 @@ void Descriptor_free(void* _self) {
     upb_handlers_unref(self->json_serialize_handlers,
                        &self->json_serialize_handlers);
   }
+  if (self->json_serialize_handlers_preserve) {
+    upb_handlers_unref(self->json_serialize_handlers_preserve,
+                       &self->json_serialize_handlers_preserve);
+  }
   xfree(self);
 }
 
@@ -271,8 +279,10 @@ VALUE Descriptor_alloc(VALUE klass) {
   self->layout = NULL;
   self->fill_handlers = NULL;
   self->fill_method = NULL;
+  self->json_fill_method = NULL;
   self->pb_serialize_handlers = NULL;
   self->json_serialize_handlers = NULL;
+  self->json_serialize_handlers_preserve = NULL;
   self->typeclass_references = rb_ary_new();
   return ret;
 }