On some Intel D3D drivers, evaluating unary minor operator on an
integer variable may get wrong answer in vertex shader.

This patch works around this bug by replacing -(int) with ~(int)+1
on Windows Intel.

BUG=chromium:644033

Change-Id: I0af719e84d618a33f25bcb33bde0c381fb462a31
Reviewed-on: https://chromium-review.googlesource.com/381675Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>