Change LOG to VLOG to avoid a lot of messages in the bots output.
Change LOG to VLOG to avoid a lot of messages in the bots output.

BUG=76576
TEST=no more libpci message in bots output.
Review URL: http://codereview.chromium.org/6713014

git-svn-id: http://src.chromium.org/svn/trunk/src@78603 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: a1e80d5effc8b372205bc85f557f5a617547a755
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