Only update style-determined composited reasons during the chicken/egg compositing update

Source/core/rendering/RenderLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 448 matching lines @@
 
     void setNeedsCompositingInputsUpdate();
     bool childNeedsCompositingInputsUpdate() const { return m_childNeedsCompositingInputsUpdate; }
     bool needsCompositingInputsUpdate() const { return m_needsCompositingInputsUpdate; }
 
     void updateCompositingInputs(const CompositingInputs&);
     void clearChildNeedsCompositingInputsUpdate();
 
     const CompositingInputs& compositingInputs() const { ASSERT(!m_needsCompositingInputsUpdate); return m_compositingInputs; }
 
-    // FIXME: Remove this function.
-    bool potentiallyStaleIsUnclippedDescendant() const { return m_compositingInputs.isUnclippedDescendant; }
-
     bool lostGroupedMapping() const { ASSERT(isAllowedToQueryCompositingState()); return m_lostGroupedMapping; }
     void setLostGroupedMapping(bool b) { m_lostGroupedMapping = b; }
 
     CompositingReasons compositingReasons() const { ASSERT(isAllowedToQueryCompositingState()); return m_compositingReasons; }
     void setCompositingReasons(CompositingReasons, CompositingReasons mask = CompositingReasonAll);
 
     bool hasCompositingDescendant() const { ASSERT(isAllowedToQueryCompositingState()); return m_hasCompositingDescendant; }
     void setHasCompositingDescendant(bool b)  { m_hasCompositingDescendant = b; }
 
     bool shouldIsolateCompositedDescendants() const { ASSERT(isAllowedToQueryCompositingState()); return m_shouldIsolateCompositedDescendants; }
@@ skipping 243 matching lines @@
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const WebCore::RenderLayer*);
 void showLayerTree(const WebCore::RenderObject*);
 #endif
 
 #endif // RenderLayer_h