endpoint WebContentClient = 90
{
    DidFinishLoad(URL url) =|
    DidPaint(Gfx::IntRect content_rect, i32 shbuf_id) =|
    DidInvalidateContentRect(Gfx::IntRect content_rect) =|
    DidChangeSelection() =|
    DidLayout(Gfx::IntSize content_size) =|
    DidChangeTitle(String title) =|
    DidRequestScrollIntoView(Gfx::IntRect rect) =|
    DidHoverLink(URL url) =|
    DidUnhoverLink() =|
    DidClickLink(URL url, String target, unsigned modifiers) =|
    DidMiddleClickLink(URL url, String target, unsigned modifiers) =|
    DidStartLoading(URL url) =|
    DidRequestContextMenu(Gfx::IntPoint content_position) =|
    DidRequestLinkContextMenu(Gfx::IntPoint content_position, URL url, String target, unsigned modifiers) =|
    DidRequestAlert(String message) => ()
}