Make net_lib build work with a shared link.
Make net_lib build work with a shared link.

Review URL: http://codereview.chromium.org/20294


git-svn-id: http://src.chromium.org/svn/trunk/src@9661 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: bfc9105fc43f5f47e56b2031900da58d6e84d899
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