Periodically log while waiting for subprocess to complete so that the bot doesn't kill us when we're taking a long time.  Also clean up the subprocess wait loop.
Periodically log while waiting for subprocess to complete so that the bot doesn't kill us when we're taking a long time.  Also clean up the subprocess wait loop.

BUG=7514

Review URL: http://codereview.chromium.org/20165

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@9588 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