Chris Yang 30e556ddc5
Add no-op callbacks to platform view gesture recognizer when necessary (#61671)
After #31935, Some one sequence gesture recognizers requires at least one callback to be able to compete in the arena. This PR adds the a no-op callback in the gesture recognizer in the platform view when the gesture recognizer does not have any callbacks. This way, all the gesture recognizers in the platform view can compete in the arena.
2020-07-17 12:13:22 -07:00
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