[chromedriver] Enable geolocation by default.
[chromedriver] Enable geolocation by default.

This is disabled by default in M46+.

BUG=
TBR=stgao@chromium.org

Review URL: https://codereview.chromium.org/1403983004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#353896}

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