Heavily based on http://crrev/c/1316888

Some apps are creating a large number of viewport combinations and
are running out of graphics memory. This CL drops their graphics
pipeline use from tens of thousands to tens.

Performance testing shows little impact to application traces.

Bug: b/190026813
Bug: angleproject:3143
Change-Id: Ib7415be1128f8fedae4a7ca72e067b2815201223
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2954925Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>