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These Tools menu items are used in several tests. Remove the
dependency of tests on tools_menu_constants.h.

Bug: 787015
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ie5d6b180f86d2628737c96feed96245c095d374a
Reviewed-on: https://chromium-review.googlesource.com/780051
Commit-Queue: Mike Baxley <baxley@chromium.org>
Reviewed-by: Menglu Huang <huangml@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518356}