Remove 'Create application shortcuts...' when in Ash on win

It's not on ChromeOS and doesn't make sense in Ash.

R=msw@chromium.org
BUG=258217

Review URL: https://codereview.chromium.org/92353002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237616 0039d316-1c4b-4281-b951-d872f2087c98
Beef up DNS probe browser tests, focusing on how they interact with Link Doctor.

BUG=308232
R=ttuttle@chromium.org

Review URL: https://codereview.chromium.org/69933006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237617 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237617