Reland "Remove menu_marker from MenuButton."

This reverts commit 5148d1fe59a144bc7eba073d4f30e4eeefa8b9af.

Reason for revert: Speculative reland, root cause should be fixed with r607193.

Original change's description:
> Revert "Remove menu_marker from MenuButton."
>
> This reverts commit 3275875871d7e5dd239acbe5ac6545d51a25cb3d.
>
> Reason for revert: causes compile failures on windows similar to the ones that appeared in the CQ runs, e.g. https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Win%20x64%20Builder/58688
>
> Original change's description:
> > Remove menu_marker from MenuButton.
> >
> > This is always false except for in tests and menu_example.cc which is
> > not used. This helps simplify MenuButton for the Button cleanup task.
> >
> > Bug: 901183
> > Change-Id: If5a3cf7b6ba1ce5618548d112df1c4404b2ae181
> > Reviewed-on: https://chromium-review.googlesource.com/c/1324375
> > Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
> > Reviewed-by: Robert Flack <flackr@chromium.org>
> > Reviewed-by: Trent Apted <tapted@chromium.org>
> > Reviewed-by: Michael Wasserman <msw@chromium.org>
> > Commit-Queue: Charlene Yan <cyan@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#607061}
>
> TBR=msw@chromium.org,flackr@chromium.org,oshima@chromium.org,tapted@chromium.org,cyan@chromium.org
>
> Change-Id: I9c311a3c8cea56c7670b2dace3e0410618151034
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: 901183
> Reviewed-on: https://chromium-review.googlesource.com/c/1330841
> Reviewed-by: John Budorick <jbudorick@chromium.org>
> Commit-Queue: John Budorick <jbudorick@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#607072}

TBR=msw@chromium.org,flackr@chromium.org,oshima@chromium.org,tapted@chromium.org,jbudorick@chromium.org,cyan@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 901183
Change-Id: I8a54361c857ac0a18acfc41dedb9537180aae4ce
Reviewed-on: https://chromium-review.googlesource.com/c/1331137
Commit-Queue: Peter Boström <pbos@chromium.org>
Reviewed-by: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607294}
19 files changed