Store rotation/ui scale to local state.

ash/display/display_change_observer_x11.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_X11_H
 #define ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_X11_H
 
 #include <X11/Xlib.h>
 
 // Xlib.h defines RootWindow.
 #undef RootWindow
 
 #include "base/basictypes.h"
 #include "chromeos/display/output_configurator.h"
 
 namespace ash {
 namespace internal {
 
 // An object that observes changes in display configuration and
 // update DisplayManagers.
-class DisplayChangeObserverX11 : public chromeos::OutputConfigurator::Observer {
+class DisplayChangeObserverX11 : public chromeos::OutputConfigurator::Delegate,
+                                 public chromeos::OutputConfigurator::Observer {
  public:
   DisplayChangeObserverX11();
   virtual ~DisplayChangeObserverX11();
 
+  // chromeos::OutputConfigurator::Delegate overrides:
+  virtual chromeos::OutputState GetStateForOutputs(
+      const std::vector<RROutput>& outputs) const OVERRIDE;
+
   // Overriden from chromeos::OutputConfigurator::Observer:
   virtual void OnDisplayModeChanged() OVERRIDE;
 
  private:
   Display* xdisplay_;
 
   ::Window x_root_window_;
 
   int xrandr_event_base_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserverX11);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_AURA_DISPLAY_CHANGE_OBSERVER_X11_H