anchor.diff:                onPointerDown: (PointerDownEvent e) { numPointerDownsOnParent++; },
               ),
               const Positioned(
  -                child: SizedBox(
  -                  width: 200.0,
  -                  height: 100.0,
  -                  child: AndroidView(
  -                    viewType: 'webview',
  -                    hitTestBehavior: PlatformViewHitTestBehavior.transparent,
  -                  ),
  -                )
  +              child: SizedBox(
  +                width: 200.0,
  +                height: 100.0,
  +                child: AndroidView(
  +                  viewType: 'webview',
  +                  hitTestBehavior: PlatformViewHitTestBehavior.transparent,
  +                ),
  +              ),
               ),
             ],
           ),
  
positive.code:     final FakePlatformViewsController viewsController = new FakePlatformViewsController(TargetPlatform.android);
      viewsController.registerViewType('webview');
      await tester.pumpWidget(
          const Center(
              child: SizedBox(
                width: 200.0,
                height: 100.0,
                child: AndroidView(viewType: 'webview'),
              )
          )
      );
  
      await tester.pumpWidget(
          const Center(
              child: SizedBox(
                width: 400.0,
                height: 200.0,
                child: AndroidView(viewType: 'webview'),
              )
          )
      );
  
      expect(
          viewsController.views,
          unorderedEquals(<FakePlatformView>[
            new FakePlatformView(currentViewId + 1, 'webview', const Size(400.0, 200.0))
          ])
      );
    });
  
  
negative.code:     viewsController.registerViewType('webview');
      final GlobalKey key = new GlobalKey();
      await tester.pumpWidget(
        new Center(
          child: new SizedBox(
            width: 200.0,
            height: 100.0,
            child: new AndroidView(viewType: 'webview', key: key),
          ),
        ),
      );
  
      await tester.pumpWidget(
  