Fix problem with crash_sender being able to run multiple times concurrently.

BUG=6134
TEST=Run CrashSender and UserCrash, also test starting those tests while crash_sender is already running.

Change-Id: Ie80c450f6b0da1b67398aa67fd9b74903abc430b

Review URL: http://codereview.chromium.org/3197024
1 file changed
tree: c21b2b2a8411adb309850f230144846c2d74b555
  1. crash_reporter/