Revert 194589 "Revert 194578 "Add ash SessionStateDelegate""

Revert 194589 "Revert 194578 "Add ash SessionStateDelegate""

The CL turned out to be innocent, the bots turned green without the revert.

> Revert 194578 "Add ash SessionStateDelegate"
> 
> > Add ash SessionStateDelegate
> > 
> > This CL refactors the ShellDelegate by adding a SessionStateDelegate to
> > which methods dealing with the session state can be moved. This cleans up
> > the huge ShellDelegate interface and paves the way for further Chrome OS
> > multiprofile work which will need to add several new methods related to
> > the session state.
> > 
> > This CL is only the first step. Several other methods should also move to
> > SessionStateDelegate but I do not want to overburden a single CL.
> > 
> > BUG=None
> > TEST=Manual and browser/unit tests
> > 
> > TBR=sky (for c/b/idle_chromeos.cc and c/chrome_browser_ui.gypi)
> > 
> > Review URL: https://codereview.chromium.org/14295008
> 
> TBR=bartfab@google.com
> 
> Review URL: https://codereview.chromium.org/14200034

TBR=gavinp@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=194602

[bartfab (slow), 2013-04-17 15:58:54]

Committed patchset #1 manually as r194602.