Added Trim support for Windows Store application certification requirement

Change-Id: Iff58863bf4af756d77521aadb1ccbaa977f0b78a
Reviewed-on: https://chromium-review.googlesource.com/227530
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
Switch to 8.1 SDK and d3dcompiler_47.dll

Change-Id: If43c7861ab7f47448fd726fd0b5c35f3a6eeb362
Reviewed-on: https://chromium-review.googlesource.com/229616
Commit-Queue: Scott Graham <scottmg@chromium.org>
Tested-by: Scott Graham <scottmg@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>