Add built-in DNS resolver support to about:labs

BUG=60149
TEST=None

Review URL: http://codereview.chromium.org/4036002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@63404 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 51671091..6cfd84c 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -159,7 +159,14 @@
     IDS_FLAGS_PRINT_PREVIEW_DESCRIPTION,
     kOsAll,
     switches::kEnablePrintPreview
-  }
+  },
+  {
+    "dns-server",
+    IDS_FLAGS_DNS_SERVER_NAME,
+    IDS_FLAGS_DNS_SERVER_DESCRIPTION,
+    kOsLinux,
+    switches::kDnsServer
+  },
 };
 
 // Stores and encapsulates the little state that about:flags has.