GitLab

Sharing the same socket name causes tests to crash if
content_browsertests process is still running while running
content_shell instrumentation tests.

Examples failures can be seen on the tryjobs for: https://codereview.chromium.org/13445005/

BUG=230113

Review URL: https://codereview.chromium.org/14301005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@194473 0039d316-1c4b-4281-b951-d872f2087c98