What steps will reproduce the problem?
(1) open chrome with command line: --enable-unsafe-es3-apis
(2) open url: https://www.khronos.org/registry/webgl/sdk/tests/deqp/functional/gles3/uniformbuffers.html?webglVersion=2


What is the expected output?
All tests in that file should pass.

What do you see instead?
All tests passed before but it began to fail since https://codereview.chromium.org/1949303003