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This is part of a series moving IO on evdev devices to a fast thread,
since UI thread is too slow for the cursor.

DeviceDataManager is a UI thread object, so move final transformation
of touches into EventFactoryEvdev prior to dispatch into UI. This
will avoid sharing state across threads.

BUG=449710
TEST=boot link_freon & move cursor

Review URL: https://codereview.chromium.org/874713002

Cr-Commit-Position: refs/heads/master@{#313204}