Add New Histogram Stats to see where Blacklist Failures are Occuring

We seem to be seeing more setup failures than expected so add so new
UMA stats to try and narrow down where the problem is occuring.

(This crashes would occur before breakpad is loaded so we don't have
any other way to gather this data for the moment).

NOTRY=True
TBR=sky@chromium.org, asvitkine@chromium.org
BUG=329023

Review URL: https://codereview.chromium.org/156113002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249467 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249467