handle "Purify" build dir in addition to "Release" and "Debug"
handle "Purify" build dir in addition to "Release" and "Debug"

Review URL: http://codereview.chromium.org/204003

git-svn-id: http://src.chromium.org/svn/trunk/src@26086 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 09d6800bf52dabaf6c0a4a5cb4030f29748b0958
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser