Address some TODO(GYP_GONE)s

No intended behavior change. If this breaks your bot because it's
trying to build a foo_run target, make it build the corresponding
foo target instead (see diff).

Depends on https://chromium-review.googlesource.com/#/c/419296/

BUG=673897
CQ_INCLUDE_TRYBOTS=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;master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=brettw

Review-Url: https://codereview.chromium.org/2569333002
Review-Url: https://codereview.chromium.org/2569333002
Cr-Original-Commit-Position: refs/heads/master@{#466331}
Committed: https://chromium.googlesource.com/chromium/src/+/1d66d232a08315927b4ffb6212c1516c6ddfbe6d
Cr-Original-Original-Commit-Position: refs/heads/master@{#466154}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 9cb3b1d088bdd435de0292a58966c4c514acd0a1