fixed geometry shaders when canUseFragCoord is false

Bug: chromium:859705
Change-Id: Ia5c5b15bd5d12bf2d1c3265664bec2c3eaef24d2
Reviewed-on: https://skia-review.googlesource.com/143114
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
1 file changed