Blink's DOM bindings are not yet ready.

BUG=493137, 239915
LOG=N
R=rossberg, adamk
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1153263004

Cr-Commit-Position: refs/heads/master@{#28804}