Enable display rotation, magnifier in unified desktop mode

ash/magnifier/magnification_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_MAGNIFIER_MAGNIFICATION_CONTROLLER_H_
 #define ASH_MAGNIFIER_MAGNIFICATION_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace aura {
-class RootWindow;
+class Window;
 }
 
 namespace ash {
 
 class ASH_EXPORT MagnificationController {
  public:
   enum ScrollDirection {
     SCROLL_NONE,
     SCROLL_LEFT,
     SCROLL_RIGHT,
@@ skipping 37 matching lines @@
 
   // Returns |point_of_interest_| in MagnificationControllerImpl. This is
   // the internal variable to stores the last mouse cursor (or last touched)
   // location. This method is only for test purpose.
   virtual gfx::Point GetPointOfInterestForTesting() = 0;
 
   // Returns true if magnifier is still on animation for moving viewport.
   // This is only used for testing purpose.
   virtual bool IsOnAnimationForTesting() const = 0;
 
+  // Switch Magnified RootWindow to |new_root_window|. This does following:

[Jun Mukai, 2015/05/01 22:06:07]

|window| ?
Also s/RootWindow/Window/ (or root window?)

[oshima, 2015/05/01 22:44:57]

Updated the comment.

+  //  - Unzoom the current root_window.
+  //  - Zoom the given new root_window |new_root_window|.
+  //  - Switch the target window from current window to |new_root_window|.
+  virtual void SwitchTargetRootWindow(aura::Window* window,
+                                      bool redraw_original_root) = 0;
+
  protected:
   MagnificationController() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MagnificationController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_MAGNIFIER_MAGNIFICATION_CONTROLLER_H_