tree 3d04f568689b0152d697c538fbacfb3ff424d451
parent d5e6101a8e50f4a54c55b3d55b82377c8c44f8f6
author Tao Zhou <taoalpha@google.com> 1565797286 +0200
committer Tao Zhou <taoalpha@google.com> 1565940169 +0200

Fix duplicate events when revert in polymer 2

Due to event retargetting, in shadow DOM, event will be fired
both from the first element and the shadowroot host.

Bug: Issue 11322
Change-Id: I52fbc0fac9dfdaf945dce3da0a266bfe58b0bd38