Make DHCP WPAD on by default.

BUG=18575
TEST=Run Chrome on Windows without any flags. Enable auto-detect in proxy configuration. Net log should show attempts to auto-detect via DHCP.

Review URL: http://codereview.chromium.org/7034035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@86422 0039d316-1c4b-4281-b951-d872f2087c98
7 files changed