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) =|
}