End2end test for WebGL conformance2/uniforms/large-uniform-buffers.html
End2end test for WebGL conformance2/uniforms/large-uniform-buffers.html

Bug in UBOs over 65535 bytes is captured in the WebGL conformance test.
Add an ANGLE end2end test to capture this behavior.

Bug: angleproject:3388
Change-Id: I8151892d22b53a9100d26cceb124c13fdbfae844
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1687116
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Reviewed-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>
Commit-Queue: Jonah Ryan-Davis <682bdb9e7d8ba359ef169b8db374e7a99d394a46@google.com>

ppy/angle,ppy/angle,ppy/angle,ppy/angle