Turn build purple if exception is raised.
Turn build purple if exception is raised.

BUG=368759

Review URL: https://codereview.chromium.org/266673003

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@267976 0039d316-1c4b-4281-b951-d872f2087c98

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