* Store InspectableWebContents instead of InspectableWebContentsView in NativeBrowserView
* Rename system_drag_exclude_areas => drag_exclude_rects
* Use NSView convertRect:toView: for BrowserView DragRegionView positioning
* Make BrowserView DragRegionViews children of the WebContents view
Previously they were children of the `InspectableWebContentsView` view,
which caused this assertion to fail:
f993888424/brightray/browser/mac/bry_inspectable_web_contents_view.mm (L162)
* Update draggable regions when changing BrowserView
Fixes#12150.