- Move vcl::RenderContext to outdev.
- Change some methods on vcl::Window to accept RenderContext
  as parameter.
- Add ApplySettings to vcl::Window - This method is called before
  painting. Refactor existing classes that use InitSettings to
  have ApplySettings or mark the classes to be refactored later.
- Add RenderSettings for adding defered settings to rendering.
  This is similar to ApplySettings but for more ad-hoc calls.

Change-Id: I4ea58461f3b6b08ccfa3e0ddd1a4a3e04f8c4f45