[wasm] Do not unregister an ArrayBuffer if it is already external

src/wasm/wasm-js.cc

Index: src/wasm/wasm-js.cc
diff --git a/src/wasm/wasm-js.cc b/src/wasm/wasm-js.cc
index bd371c0c50819ad5def070357e54b9951ea8de11..87432de9b6052279748631e5e6f93b893f99f6ee 100644
--- a/src/wasm/wasm-js.cc
+++ b/src/wasm/wasm-js.cc
@@ -740,7 +740,8 @@ void WebAssemblyMemoryGrow(const v8::FunctionCallbackInfo<v8::Value>& args) {
     thrower.RangeError("Unable to grow instance memory.");
     return;
   }
-  i::wasm::DetachWebAssemblyMemoryBuffer(i_isolate, old_buffer);
+  i::wasm::DetachWebAssemblyMemoryBuffer(i_isolate, old_buffer,
+                                         static_cast<uint32_t>(delta_size));
   v8::ReturnValue<v8::Value> return_value = args.GetReturnValue();
   return_value.Set(ret);
 }