Change Widget subclasses to use a CullRect instead of an IntRect for painting.

third_party/WebKit/Source/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 20 matching lines @@
 #include "platform/PlatformExport.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebFocusType.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
+class CullRect;
 class Event;
 class GraphicsContext;
 class HostWindow;
 
 // The Widget class serves as a base class for FrameView, Scrollbar, and PluginView.
 //
 // Widgets are connected in a hierarchy, with the restriction that plugins and
 // scrollbars are always leaves of the tree. Only FrameView can have children
 // (and therefore the Widget class has no concept of children).
 class PLATFORM_EXPORT Widget : public RefCountedWillBeGarbageCollectedFinalized<Widget> {
@@ skipping 10 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&) const { }
+    virtual void paint(GraphicsContext*, const CullRect&) const { }
     void invalidate() { invalidateRect(boundsRect()); }
     virtual void invalidateRect(const IntRect&) = 0;
 
     virtual void setFocus(bool, WebFocusType) { }
 
     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.
@@ skipping 48 matching lines @@
 private:
     RawPtrWillBeMember<Widget> m_parent;
     IntRect m_frame;
     bool m_selfVisible;
     bool m_parentVisible;
 };
 
 } // namespace blink
 
 #endif // Widget_h