This patch adds support for a "non-private" window flag which can be
used to open new chrome windows in non-private mode in per-window
private browsing builds. It also tests to make sure that the flag is
not accessible from content.
This patch adds support for a "private" window flag which can be used to
open new chrome windows in private browsing mode. It also tests to make
sure that the flag is not accessible from content. A test in the next
part makes sure that the flag is accessible from chrome.
