Revert 256563 "Reland r256396 Add views implementation for AXTre..."

trunk/src/ui/views/widget/widget_observer.h

Index: trunk/src/ui/views/widget/widget_observer.h
===================================================================
--- trunk/src/ui/views/widget/widget_observer.h	(revision 256744)
+++ trunk/src/ui/views/widget/widget_observer.h	(working copy)
@@ -14,7 +14,6 @@
 namespace views {
 
 class Widget;
-class View;
 
 // Observers can listen to various events on the Widgets.
 class VIEWS_EXPORT WidgetObserver {
@@ -46,9 +45,6 @@
   virtual void OnWidgetBoundsChanged(Widget* widget,
                                      const gfx::Rect& new_bounds) {}
 
-  // Called after a descendant view of |widget| is removed.
-  virtual void OnViewRemoved(Widget* widget, View* view) {}
-
  protected:
   virtual ~WidgetObserver() {}
 };