Intermittent failure of /_mozilla/webgl/conformance-1.0.3/conformance/ogles/GL/build/build_001_to_008.html and /_mozilla/webgl/conformance-1.0.3/conformance/ogles/GL/build/build_009_to_016.html

[emilio]

First seen in #13159.

[jdm]

  ▶ ERROR [expected OK] /webgl/conformance-1.0.3/conformance/ogles/GL/build/build_001_to_008.html
  └   → gl.getProgramInfoLog is not a function

[wafflespeanut]

Also in #13171,

▶ ERROR [expected OK] /webgl/conformance-1.0.3/conformance/ogles/GL/build/build_009_to_016.html
└   → gl.getProgramInfoLog is not a function

[emilio]

All these gl.whatever is not a function make me think that this might be related to the latest changes in object prototypes that have been introduced. The WebGL tests use eval() exhaustively, and I'm wondering if something like #13017 could be the root cause.

cc @nox

[emilio]

Gah, turns out I shouldn't look at these issues by night, and those are actually unimplemented functions... I'll investigate more when I have the time. FWIW I was pretty sure we implemented GetProgramInfoLog.