This also changes the dirty TF object to use a Serial, which is more
secure for very edge-care reallocation issues. It also moves the
StateManager11::updateState call to be the very first thing that
happens in a draw call. This prepares the back-end for making the
state sync actually happen in Context11::syncState, instead of
inside the draw call.

Also moves a bit more TF management code out of RendererD3D and
Renderer9.

BUG=angleproject:2052

Change-Id: I93d033a07be2049023111975a31637c53893e8c8
Reviewed-on: https://chromium-review.googlesource.com/659229Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>