Commits on Jun 15, 2022

1. Make popups animation-friendly …

   Now, popups will follow this process when showing/hiding:
   
   showPopup():
    1. Move the popup to the top layer, and remove the UA display:none
       style.
    2. Update style. (Transition initial style can be specified in this
       state.)
    3. Set the :top-layer pseudo class.
    4. Update style. (Animations/transitions happen here.)
   
   hidePopup():
    1. Capture any already-running animations via getAnimations().
    2. Remove the :top-layer pseudo class.
    3. Update style. (Animations/transitions start here.)
    4. If the hidePopup() call is not due to a "force out" situation,
       getAnimations() again, remove any from step #1, and then wait here
       until all of them finish or are cancelled.
    4. Remove the popup from the top layer, and add the UA display:none
       style.
    5. Update style.
   
   See this issue for more details:
     openui/open-ui#335
   
   Bug: 1307772
   Change-Id: Ia20eb6e9533c1a0b1029ca1279d42fe2648300af
   Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3688871
   Reviewed-by: Robert Flack <[email protected]>
   Commit-Queue: Mason Freed <[email protected]>
   Cr-Commit-Position: refs/heads/main@{#1014235}

   

   mfreed7 authored and chromium-wpt-export-bot committed Jun 15, 2022
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