This merges all calls to IASetInputLayout to a single place in
StateManager11. This means we no longer have to invalidate the state
for D3D11, and can always lazily apply the input layout state.

Introduces a new ResourceSerial class to replace the uintptr_t and
DirtyPointer design.

BUG=angleproject:2052

Change-Id: I76b874218b754395f25a129967c769b1f8f82115
Reviewed-on: https://chromium-review.googlesource.com/523025Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>