- Rename X11CompositorWidget to GtkCompositorWidget to handle both X11 and Wayland backends.
- Rename X11CompositorWidgetInitData to GtkCompositorWidgetInitData
- Implement Wayland support at WindowSurfaceProvider, WindowSurfaceProvider::CreateWindowSurface()
is able to create WindowSurfaceWayland.
- Initialize Wayland surface provider at nsWindow::Create()
MozReview-Commit-ID: 1WvR9nWHa3L