Merge pull request #5859 from electron/felix-extension-warning
authorCheng Zhao <zcbenz@gmail.com>
Mon, 6 Jun 2016 01:22:47 +0000 (01:22 +0000)
committerGitHub <noreply@github.com>
Mon, 6 Jun 2016 01:22:47 +0000 (01:22 +0000)
Log a warning if an extension has already been loaded


Trivial merge