GitLab

The client plugin may crash if a signaling message is receive before the 
client started connection. It's likely to be a leftover from a previous 
session, so it's safe to ignore it.

BUG=226775


Review URL: https://chromiumcodereview.appspot.com/13594011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@192923 0039d316-1c4b-4281-b951-d872f2087c98