GitLab

Supports GN build of //jingle, though its targets won't be linkable
until its dependency //third_party/libjingle is properly supported.

TBR=ajwong
BUG=

Review URL: https://codereview.chromium.org/431423002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287425 0039d316-1c4b-4281-b951-d872f2087c98