Fix geometry shader draw mode validation The draw mode (as passed to glDrawArrays) was being compared with the transform feedback mode in the presence of geometry shaders, but the two are completely unrelated. Bug: angleproject:5579 Change-Id: I03bff97f79fe8d8a4354a6ea3abfed58c1e600eb Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2653907 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com>