Restrict type attribute on menuitem
Restrict type attribute on menuitem to known values only[1]:
"The attribute is an enumerated attribute with three keywords
and states. The "command" keyword maps to the Command state, the
"checkbox" keyword maps to the Checkbox state, and the "radio"
keyword maps to the Radio state. The missing value default
is the Command state."
BUG=665000
[1] https://html.spec.whatwg.org/#attr-menuitem-type
Review-Url: https://codereview.chromium.org/2372593005
Cr-Commit-Position: refs/heads/master@{#432046}
4 files changed
