Fix KillProcess so it doesn't report everything as a failure.
Fix KillProcess so it doesn't report everything as a failure.

BUG=none
TEST=UI tests on Mac should no longer all log that kills are failing.
Review URL: http://codereview.chromium.org/155297

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@20566 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser