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 28 matching lines @@
 struct ASH_EXPORT DisplayLayout {
   // Layout options where the secondary display should be positioned.
   enum Position {
     TOP,
     RIGHT,
     BOTTOM,
     LEFT
   };
   // Factory method to create DisplayLayout from int values.
   // Used for persistence and webui.
-  static DisplayLayout FromInts(int position, int offsets);
+  static DisplayLayout FromInts(int position, int offsets, bool mirror);
 
   DisplayLayout();
-  DisplayLayout(Position position, int offset);
+  DisplayLayout(Position position, int offset, bool mirrored);
 
   // Returns an inverted display layout.
   DisplayLayout Invert() const WARN_UNUSED_RESULT;
 
   // Converter functions to/from base::Value.
   static bool ConvertFromValue(const base::Value& value, DisplayLayout* layout);
   static bool ConvertToValue(const DisplayLayout& layout, base::Value* value);
 
   // This method is used by base::JSONValueConverter, you don't need to call
   // this directly. Instead consider using converter functions above.
   static void RegisterJSONConverter(
       base::JSONValueConverter<DisplayLayout>* converter);
 
   Position position;
 
   // The offset of the position of the secondary display.  The offset is
   // based on the top/left edge of the primary display.
   int offset;
 
+  bool mirrored;
+
   // Returns string representation of the layout for debugging/testing.
   std::string ToString() const;
 };
 
 // DisplayController owns and maintains RootWindows for each attached
 // display, keeping them in sync with display configuration changes.
 class ASH_EXPORT DisplayController : public gfx::DisplayObserver {
  public:
   class ASH_EXPORT Observer {
    public:
@@ skipping 172 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_