Delete a bunch of noop paint invalidation code.

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 45 matching lines @@
     virtual void setFrameRect(const IntRect& frame) { m_frame = frame; }
     const IntRect& frameRect() const { return m_frame; }
     IntRect boundsRect() const { return IntRect(0, 0, width(),  height()); }
 
     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;
+    // FIXME(sky): Remove
+    void invalidate() { }
 
     virtual bool isFrameView() const { return false; }
     virtual bool isScrollbar() const { return false; }
 
     virtual HostWindow* hostWindow() const { ASSERT_NOT_REACHED(); return 0; }
     Widget* parent() const { return m_parent; }
     Widget* root() const;
 
     // Virtual methods to convert points to/from the containing ScrollView
     virtual IntRect convertToContainingView(const IntRect& localRect) const { return localRect; }
     virtual IntRect convertFromContainingView(const IntRect& localRect) const { return localRect; }
     virtual IntPoint convertToContainingView(const IntPoint& localPoint) const  { return localPoint; }
     virtual IntPoint convertFromContainingView(const IntPoint& localPoint) const { return localPoint; }
 
 private:
     Widget* m_parent;
     IntRect m_frame;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_PLATFORM_WIDGET_H_