Roll grit in DEPS to 4983981a (r200) for a GN build fix.
Roll grit in DEPS to 4983981a (r200) for a GN build fix.

This rolls grit to 4983981a (r200) for a GN build fix; the
bug was causing some changes to not properly trigger incremental
rebuilds.

TBR=brettw@chromium.org
BUG=541158

Review URL: https://codereview.chromium.org/1399693002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#353195}

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