Implement overscroll support for the virtual keyboard.

ash/shelf/shelf_layout_manager.h

Index: ash/shelf/shelf_layout_manager.h
diff --git a/ash/shelf/shelf_layout_manager.h b/ash/shelf/shelf_layout_manager.h
index fc4bd76e2d05ad586b74c10f641efa7a5948a9d9..22ebf4acdd1baf69544323b91d6dc04101e047cf 100644
--- a/ash/shelf/shelf_layout_manager.h
+++ b/ash/shelf/shelf_layout_manager.h
@@ -324,10 +324,6 @@ class ASH_EXPORT ShelfLayoutManager :
   // Returns true if the shelf should be forced to be visible.
   bool IsShelfForcedToBeVisible() const;
 
-  // Return the bounds available in the parent, taking into account the bounds
-  // of the keyboard if necessary.
-  gfx::Rect GetAvailableBounds() const;
-
   // Overridden from keyboard::KeyboardControllerObserver:
   virtual void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) OVERRIDE;