Revert 69167, itself a revert of 69165 - Merge the installer, installer_util and setup_util namespaces into a single installer namespace. 

BUG=61609
TEST=NONE


Review URL: http://codereview.chromium.org/5738009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69256 0039d316-1c4b-4281-b951-d872f2087c98
58 files changed