DevTools: Make sure all exceptions in compile_frontend.py fail the presubmit

R=yurys
NOTRY=true

Review URL: https://codereview.chromium.org/446503003

git-svn-id: svn://svn.chromium.org/blink/trunk@179502 bbb929c8-8fbe-4397-9dbb-9b2b20218538