Revert "Revert "Enhance logging_UserCrash to detect problems with crash reporting setup"" This reverts commit fe329e34eddd4288ec36ecb69c751b3bdc117c6b. BUG=chromium-os:13748 TEST= TBR=dianders@chromium.org Change-Id: I566cabe72081460190be16fea5da5c1bf8b136f3