• Kate Lovett's avatar
    Update VelocityTracker (4) (#139166) · 8ba459ce
    Kate Lovett authored
    This updates the implementation to use the stopwatch from the Clock object and pipes it through to the TestWidgetsFlutterBinding so it will be kept in sync with FakeAsync.
    
    Relands https://github.com/flutter/flutter/pull/138843 attempted to reland https://github.com/flutter/flutter/pull/137381 which attempted to reland #132291
    Fixes https://github.com/flutter/flutter/issues/97761
    
    1. The original change was reverted due to flakiness it introduced in tests that use fling gestures.
      * Using a mocked clock through the test binding fixes this now
    2. It was reverted a second time because a change at tip of tree broke it, exposing memory leaks, but it was not rebased before landing. 
      * These leaks are now fixed
    3. It was reverted a third time, because we were so excellently quick to revert those other times, that we did not notice the broken benchmark that only runs in postsubmit.
      * The benchmark is now fixed
    8ba459ce
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