Added Vulkan Shader Modules with GLSL->SPIR-V translation.

R=piman@chromium.org
BUG=582558
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_optional_gpu_tests_rel;tryserver.chromium.mac:mac_optional_gpu_tests_rel;tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/1975183003
Cr-Commit-Position: refs/heads/master@{#394232}
9 files changed