Focus following for the non-editable controls on web page in magnifier 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"
@@ skipping 35 matching lines @@
   virtual float GetScale() const = 0;
 
   // Set the top-left point of the magnification window.
   virtual void MoveWindow(int x, int y, bool animate) = 0;
   virtual void MoveWindow(const gfx::Point& point, bool animate) = 0;
   // Returns the current top-left point of the magnification window.
   virtual gfx::Point GetWindowPosition() const = 0;
 
   virtual void SetScrollDirection(ScrollDirection direction) = 0;
 
+  // Returns the view port(i.e. the current visible window)'s Rect in root
+  // window coordinates.
+  virtual gfx::Rect GetViewportRect() const = 0;
+
+  // Follows the focus on web page for non-editable controls.
+  virtual void HandleFocusedNodeChanged(
+      bool is_editable_node,
+      const gfx::Rect& node_bounds_in_screen) = 0;
+
   // 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;
 
  protected:
   MagnificationController() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MagnificationController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_MAGNIFIER_MAGNIFICATION_CONTROLLER_H_