Remove concept of child Widgets.

sky/engine/platform/Widget.h

 /*
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2008 Collabora Ltd.  All rights reserved.
  * Copyright (C) 2013 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 55 matching lines @@
 
     void resize(int w, int h) { setFrameRect(IntRect(x(), y(), w, h)); }
     void resize(const IntSize& s) { setFrameRect(IntRect(location(), s)); }
     void move(int x, int y) { setFrameRect(IntRect(x, y, width(), height())); }
     void move(const IntPoint& p) { setFrameRect(IntRect(p, size())); }
 
     virtual void paint(GraphicsContext*, const IntRect&) { }
     void invalidate() { invalidateRect(boundsRect()); }
     virtual void invalidateRect(const IntRect&) = 0;
 
-    virtual void setFocus(bool) { }
-
-    virtual void show() { }
-    virtual void hide() { }
     bool isSelfVisible() const { return m_selfVisible; } // Whether or not we have been explicitly marked as visible or not.
     bool isParentVisible() const { return m_parentVisible; } // Whether or not our parent is visible.
     bool isVisible() const { return m_selfVisible && m_parentVisible; } // Whether or not we are actually visible.
     virtual void setParentVisible(bool visible) { m_parentVisible = visible; }
     void setSelfVisible(bool v) { m_selfVisible = v; }
 
     virtual bool isFrameView() const { return false; }
     virtual bool isScrollbar() const { return false; }
     virtual bool isScrollView() const { return false; }
 
@@ skipping 14 matching lines @@
     // that tries to convert the location of a rect using the point-based convertFromContainingWindow will end
     // up with an inaccurate rect. Always make sure to use the rect-based convertFromContainingWindow method
     // when converting window rects.
     IntRect convertToContainingWindow(const IntRect&) const;
     IntRect convertFromContainingWindow(const IntRect&) const;
 
     IntPoint convertToContainingWindow(const IntPoint&) const;
     IntPoint convertFromContainingWindow(const IntPoint&) const;
     FloatPoint convertFromContainingWindow(const FloatPoint&) const;
 
-    virtual void frameRectsChanged() { }
-
-    // Notifies this widget that other widgets on the page have been repositioned.
-    virtual void widgetPositionsUpdated() { }
-
     // Virtual methods to convert points to/from the containing ScrollView
     virtual IntRect convertToContainingView(const IntRect&) const;
     virtual IntRect convertFromContainingView(const IntRect&) const;
     virtual IntPoint convertToContainingView(const IntPoint&) const;
     virtual IntPoint convertFromContainingView(const IntPoint&) const;
 
     // Virtual methods to convert points to/from child widgets
     virtual IntPoint convertChildToSelf(const Widget*, const IntPoint&) const;
     virtual IntPoint convertSelfToChild(const Widget*, const IntPoint&) const;
 
-    // Notifies this widget that it will no longer be receiving events.
-    virtual void eventListenersRemoved() { }
-
-#if ENABLE(OILPAN)
-    virtual void detach() { }
-#endif
-
 private:
     Widget* m_parent;
     IntRect m_frame;
     bool m_selfVisible;
     bool m_parentVisible;
 };
 
 } // namespace blink
 
 #endif // Widget_h