GitLab

Move the gesture event targeting logic from
RootView::DispatchGestureEvent() into ViewTargeter's
overrides of FindTargetForEvent() and
FindNextBestTarget().

BUG=404224
TEST=ViewTargeterTest.ViewTargeterForGestureEvents

Review URL: https://codereview.chromium.org/481433006

Cr-Commit-Position: refs/heads/master@{#292321}