Add a hack to set shouldPaint to true for force-composited iframes.

third_party/WebKit/Source/core/layout/FloatingObjects.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 60 matching lines @@
     void setWidth(LayoutUnit width) { ASSERT(!isInPlacedTree()); m_frameRect.setWidth(width); }
     void setHeight(LayoutUnit height) { ASSERT(!isInPlacedTree()); m_frameRect.setHeight(height); }
 
     const LayoutRect& frameRect() const { ASSERT(isPlaced()); return m_frameRect; }
 
 #if ENABLE(ASSERT)
     bool isInPlacedTree() const { return m_isInPlacedTree; }
     void setIsInPlacedTree(bool value) { m_isInPlacedTree = value; }
 #endif
 
-    bool shouldPaint() const { return m_shouldPaint; }
+    bool shouldPaint() const;
     void setShouldPaint(bool shouldPaint) { m_shouldPaint = shouldPaint; }
     bool isDescendant() const { return m_isDescendant; }
     void setIsDescendant(bool isDescendant) { m_isDescendant = isDescendant; }
     bool isLowestNonOverhangingFloatInChild() const { return m_isLowestNonOverhangingFloatInChild; }
     void setIsLowestNonOverhangingFloatInChild(bool isLowestNonOverhangingFloatInChild) { m_isLowestNonOverhangingFloatInChild = isLowestNonOverhangingFloatInChild; }
 
     // FIXME: Callers of these methods are dangerous and should be whitelisted explicitly or removed.
     RootInlineBox* originatingLine() const { return m_originatingLine; }
     void setOriginatingLine(RootInlineBox* line) { m_originatingLine = line; }
 
 private:
     explicit FloatingObject(LayoutBox*);
     FloatingObject(LayoutBox*, Type, const LayoutRect&, bool shouldPaint, bool isDescendant, bool isLowestNonOverhangingFloatInChild);
 
+    bool shouldPaintForCompositedLayoutPart();
+
     LayoutBox* m_layoutObject;
     RootInlineBox* m_originatingLine;
     LayoutRect m_frameRect;
 
     unsigned m_type : 2; // Type (left or right aligned)
     unsigned m_shouldPaint : 1;
     unsigned m_isDescendant : 1;
     unsigned m_isPlaced : 1;
     unsigned m_isLowestNonOverhangingFloatInChild : 1;
 #if ENABLE(ASSERT)
@@ skipping 93 matching lines @@
     static String toString(const LayoutUnit value);
 };
 template<> struct ValueToString<FloatingObject*> {
     static String toString(const FloatingObject*);
 };
 #endif
 
 } // namespace blink
 
 #endif // FloatingObjects_h