[OSX, rAC] Fix helpers to match Views behavior.

The field accessor functions for the Views test helpers only obtain
values from sections that are actually active. (By virtue of the way
the Views dialog is built). Match OSX to do the same.

NOTRY=true
BUG=none
R=estade@chromium.org

Review URL: https://codereview.chromium.org/162813004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251245 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251245