Compile with enable_mdns by default on Windows and Linux

This will compile MDns support by default on Windows and Linux. Note that this
is separate from actually enabling MDns, which will be gated by the
"--enable-device-discovery" flag.

BUG=233821

Review URL: https://chromiumcodereview.appspot.com/18374002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@210906 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed