Move background_contents back to chrome, since that's part of extensions which isn't moving.  I incorrectly moved it.
Review URL: http://codereview.chromium.org/6538095

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@75624 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed