Revert "Support constant folding of exponential built-ins" Causing compile errors on Android: ../../third_party/angle/src/compiler/translator/IntermNode.cpp:1309:62: error: use of undeclared identifier 'log2f' else if (!foldFloatTypeUnary(unionArray[i], &log2f, infoSink, &tempConstArray[i])) This reverts commit 1623a1b90f24cd1afd8839c0726ad276a887fbda. Change-Id: If9c45aea85801eb11e7d1513b4183ec11289d2f3 Reviewed-on: https://chromium-review.googlesource.com/266154 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>