FuchsiaWebView constructor

*[<Null safety>](https://dart.dev/null-safety)*

FuchsiaWebView({FuchsiaWebServices? fuchsiaWebServices})

This constructor should only be used to inject a platform controller for testing.

TODO(nkorsote): hide this implementation detail

Implementation

@visibleForTesting
FuchsiaWebView({this.fuchsiaWebServices});