Add a test to expose boolean uniform bug on Intel windows This test is ported from webgl conformance test WebglConformance_conformance2_glsl3_short_circuiting_in_loop_condition. Since HLSL and ESSL have different rules to process short-circuit evaluation, this patch will use the final flattened shader so that the translated HLSL is almost same with the current ES shader. BUG=843369 TEST=angle_end2end_tests Change-Id: Ibc742f8ac4592a83c4c7dad37a64a5563eb58bd5 Reviewed-on: https://chromium-review.googlesource.com/1090328 Commit-Queue: Jiajia Qin <jiajia.qin@intel.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>