tree 2ef1e5f72198aed0724855221b6e523353448365
parent b0e442f33dee77eb1925e6ecfc62b87220d56071
author Laura Peskin <pesk@google.com> 1542250330 -0800
committer Laura Peskin <pesk@google.com> 1542321542 -0800

[EventAggregator] Reland EventAggregator

Relanding commit 2d1c59e689c85e769deb6623305464335331bd7a with
additional BUILD.gn files.

Change-Id: Idc77b3ac562fe437045eb5619b99803dca9b47e1