commit 20a443ce6dd653ce3259782667598f9b87211e5d
author Yuki Yamada <yukiy@google.com> Mon Sep 10 02:27:07 2018
committer Commit Bot <commit-bot@chromium.org> Mon Sep 10 02:27:07 2018
tree 14a6357a36d56452db09ccefd708262d7845885f
parent 8a2c335368664b66cbb29fc739bb864dfd37b4a6

Reland: Split implementation of EventListener and EventHandler

This reverts commit 9f87a1ee823c8bf185dfdde265e457c2cc668191.
https://chromium-review.googlesource.com/c/chromium/src/+/1212202

Regarding to crbug.com/881688 :
This CL adds the check for if listener is empty or not before calling
it, but it should not be empty at that time. This is because listener
object could be collected prematurally by garbage collection.
This will be fixed after unified GC is launched, or wrapper-tracing is
applied appropriately to all the EventTarget (some of EventTargets need
to be ActiveScriptWrappable).

Bug: 872138, 881688, 878658, 606900, 849236
Change-Id: I9b224e0d261e1567c4c4f7778bd0d6044b7f6202
Reviewed-on: https://chromium-review.googlesource.com/1212376
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Hayato Ito <hayato@chromium.org>
Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Commit-Queue: Yuki Yamada <yukiy@google.com>
Cr-Commit-Position: refs/heads/master@{#589820}