Rebased on top of _win.S change, which I hope lands first.
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel,win_chrome_official,win_chromium_dbg_ng,win_chromium_rel_ng,win_chromium_compile_dbg_ng,win_chromium_compile_rel_ng,win_clang;master.tryserver.chromium.android:android_optional_gpu_tests_rel
Change-Id: I30e97dbb55b8a42251b46f5607096ca12bc670b9
Reviewed-on: https://skia-review.googlesource.com/10462
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Herb Derby <herb@google.com>