The patch extends Renderer11 so that a D3D11.1 device and
D3D11.3 context can be created. This is necessary for using
the D3D11.3 feature called
VPAndRTArrayIndexFromAnyShaderFeedingRasterizer.

BUG=angleproject:2062
BUG=angleproject:2145
TEST=angle_end2end_tests

Change-Id: I84c761b2897d7d911686f5b6d79cb93e233015a0
Reviewed-on: https://chromium-review.googlesource.com/591448Reviewed-by: Geoff Lang <geofflang@chromium.org>