Enable ParallelCompile for Mac Linked in parallel, GLSLTest_ES3.LargeNumberOfFloat4Parameters fails on the Mac asan bots. It looks a driver bug caused by handling some long GLSL expressions. This works around it by breaking down the expression in the test from: return a0 + a1 + ... + alast; to: vec4 sum = vec4(0, 0, 0, 0); sum += a0; sum += a1; ... sum += alast; return sum; This also fixes a CGLPixelFormat leak, although it's irrelevant to the bot failures. BUG=922936 BUG=angleproject:3087 BUG=angleproject:3047 Change-Id: I20249ada43e9dd226f582a568ed4ed50a0e4375d Reviewed-on: https://chromium-review.googlesource.com/c/1426430 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jie A Chen <jie.a.chen@intel.com>