HTML integration

[marcoscaceres]

Notes on where this specification needs better integration with HTML:

• In the set the active document algorithm, the relevant's Screen's type and angle should be set. That would solve browsing context initialization (create a new browsing context) at the right point in time.
• The "page visibility change steps" should be moved the HTML.
• creating the browsing context must set the type and angle attributes

[annevk]

Presumably the actual orientation change needs integration with "update the rendering".

[marcoscaceres]

Note to future self:

• needs to test "resize" events or other related events that could happen when updating the rendering.
• queue something that execute the change orientation and figure out which events fire in which order.

[annevk]

I think instead of queuing HTML might need to call in to run some kind of notification steps as per my earlier comment? (Perhaps that uses some kind of queue though.)