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 <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>