Revert of Turn build purple if exception is raised. (https://codereview.chromium.org/266673003/)
Revert of Turn build purple if exception is raised. (https://codereview.chromium.org/266673003/)

Reason for revert:
broke expectation tests probably

Original issue's description:
> Turn build purple if exception is raised.
> 
> BUG=368759
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=267976

TBR=iannucci@chromium.org,stip@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=368759

Review URL: https://codereview.chromium.org/262063002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@267998 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build