Use case

FlutterDriver's scroll fires a Scroll command that triggers the _scroll method on the handler_factory that first performs a pointer.down, pointer.move and then a pointer.up. This indeed makes a lot of sense for mobile.

However, now that Flutter is also targeting desktop and web, it would be nice to have a 'normal' non-mobile scroll implemented in the FlutterDriver as a standard.

Proposal

Seeing as scrolling is the same for desktop and web, I suggest renaming the current (mobile) Scroll Command to MobileScroll. Thus also renaming the method name on the factory_handler.dart from _scroll to _mobileScroll.

Create a new Scroll Command and implement a _scroll method on the factory_handler.dart to perform a pointer.scroll without the pointer.down and pointer.up.

I am still a bit torn on renaming the actual scroll method on FlutterDriver, as that is breaking.
We could just apply a scroll method on WebFlutterDriver, but this ignores desktop.

Thoughts?

I would be happy to do the PR for this.