Added arrow key navigation to Overview Mode

ash/wm/overview/window_selector_item.h

 // Copyright 2013 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_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
 #define ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
@@ skipping 54 matching lines @@
   // Sets the bounds of this window selector item to |target_bounds| in the
   // |root_window| root window.
   void SetBounds(aura::Window* root_window,
                  const gfx::Rect& target_bounds,
                  bool animate);
 
   // Recomputes the positions for the windows in this selection item. This is
   // dispatched when the bounds of a window change.
   void RecomputeWindowTransforms();
 
+  // Sends an a11y focus alert so that, if chromevox is enabled, the window
+  // label is read.
+  void SendFocusAlert() const;
+
   const gfx::Rect& bounds() { return bounds_; }
   const gfx::Rect& target_bounds() { return target_bounds_; }
 
  protected:
   // Sets the bounds of this selector's items to |target_bounds| in
   // |root_window|. If |animate| the windows are animated from their current
   // location.
   virtual void SetItemBounds(aura::Window* root_window,
                              const gfx::Rect& target_bounds,
                              bool animate) = 0;
@@ skipping 30 matching lines @@
   // Transparent window on top of the real windows in the overview that
   // activates them on click or tap.
   scoped_ptr<TransparentActivateWindowButton> activate_window_button_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowSelectorItem);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_