Store rotation/ui scale to local state.

ash/display/display_controller.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_CONTROLLER_H_
 #define ASH_DISPLAY_DISPLAY_CONTROLLER_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 76 matching lines @@
     // have been applied.
     virtual void OnDisplayConfigurationChanged() {};
 
    protected:
     virtual ~Observer() {}
   };
 
   DisplayController();
   virtual ~DisplayController();
 
+  void Start();
   void Shutdown();
 
   // Returns primary display. This is safe to use after ash::Shell is
   // deleted.
   static const gfx::Display& GetPrimaryDisplay();
 
   // Returns the number of display. This is safe to use after
   // ash::Shell is deleted.
   static int GetNumDisplays();
 
@@ skipping 52 matching lines @@
 
   const DisplayLayout& default_display_layout() const {
     return default_display_layout_;
   }
   void SetDefaultDisplayLayout(const DisplayLayout& layout);
 
   // Registeres the display layout info for the specified display(s).
   void RegisterLayoutForDisplayIdPair(int64 id1,
                                       int64 id2,
                                       const DisplayLayout& layout);
+  // OBSOLETE
   void RegisterLayoutForDisplayId(int64 id, const DisplayLayout& layout);
 
   // Sets the layout for the current display pair. The |layout| specifies
   // the locaion of the secondary display relative to the primary.
   void SetLayoutForCurrentDisplays(const DisplayLayout& layout);
 
   // Returns the display layout used for current displays.
   DisplayLayout GetCurrentDisplayLayout() const;
 
   // Returns the current display pair.
@@ skipping 72 matching lines @@
   // Store the primary root window temporarily while replacing
   // display.
   aura::RootWindow* primary_root_window_for_replace_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_DISPLAY_CONTROLLER_H_