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This will also be enabled on Aura when Aura and Android touch selection flows
finally unified. I also plan to have at least one more experimental strategy
implmenented.

Prerequisite CL: https://codereview.chromium.org/988023005/

BUG=451255

Review URL: https://codereview.chromium.org/1096773002

Cr-Commit-Position: refs/heads/master@{#326896}