Modify crash-reporter to collect crash information for unofficial builds.

BUG=chromium-os:12207
TESTS=logging_UserCrash, logging_CrashSender, manual test which involves
purposely crashing a test to determine if minidump information is properly
collected

Change-Id: Id2195125289a695515b1722442116d6a6d9c4895

Review URL: http://codereview.chromium.org/6559003
3 files changed