Change the signature of native callback functions

[sergz]

Background

The recent signature is void FunctionCallback(const FunctionCallbackInfo<Value>& info); thus no return value and instead of v8::Arguments v8::FunctionCallbackInfo.

• To return value one has to use info.GetReturnValue().Set(value to return);.
• To throw an exception one has to call isolate->ThrowException(value).
• To return v8::Undefined - do nothing.

[sergz]

Done as a part of #4907.