Module widget 

Widget — the engine’s top-level entry point for rendering contexts.

Chrome equivalent: core/frame/ — WebFrameWidgetImpl, LocalFrameView.

The platform creates a FrameWidget per view. All engine operations (input handling, lifecycle updates, document access) go through it.

Structs

FrameWidget

The engine’s entry point for a single rendering context.

Viewport

The rendering viewport — physical dimensions and DPI scale factor.