[net/dns] Suffix search list for DnsConfigService and related features.
Implements domain name devolution, search list policy and AppendToMultiLabelName. Also fixes behavior for single-label names with empty search list.
BUG=99510,109902,109949
TEST=./net_unittests --gtest_filter=DnsConfigServiceWin*
Review URL: http://codereview.chromium.org/9232059
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@120851 0039d316-1c4b-4281-b951-d872f2087c98
10 files changed
