Store rotation/ui scale to local state.

ash/display/display_change_observer_x11.h

Index: ash/display/display_change_observer_x11.h
diff --git a/ash/display/display_change_observer_x11.h b/ash/display/display_change_observer_x11.h
index e0456fcb4c8229d20e1ee94898039e4ab059614f..f663fe06ab42accdbab1da6981d97c4fef1e8d2e 100644
--- a/ash/display/display_change_observer_x11.h
+++ b/ash/display/display_change_observer_x11.h
@@ -18,11 +18,16 @@ 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;