Revert 194578 "Add ash SessionStateDelegate"

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

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=194589

[gavinp, 2013-04-17 14:47:51]

Committed patchset #1 manually as r194589.