Remove dead StyleDifference::needsRecompositeLayer

Source/core/rendering/style/RenderStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Adobe Systems Incorporated. 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 384 matching lines @@
         }
     }
 
     if (diffNeedsRepaintLayer(other))
         diff.setNeedsRepaintLayer();
     else if (diffNeedsRepaintObject(other))
         diff.setNeedsRepaintObject();
 
     changedContextSensitiveProperties = computeChangedContextSensitiveProperties(other, diff);
 
-    if (diff.hasNoChange() && diffNeedsRecompositeLayer(other))
-        diff.setNeedsRecompositeLayer();
-
     // Cursors are not checked, since they will be set appropriately in response to mouse events,
     // so they don't need to cause any repaint or layout.
 
     // Animations don't need to be checked either. We always set the new style on the RenderObject, so we will get a chance to fire off
     // the resulting transition properly.
 
     return diff;
 }
 
 bool RenderStyle::diffNeedsFullLayoutAndRepaint(const RenderStyle& other) const
@@ skipping 242 matching lines @@
             || rareNonInheritedData->m_objectFit != other.rareNonInheritedData->m_objectFit
             || rareNonInheritedData->m_objectPosition != other.rareNonInheritedData->m_objectPosition
             || rareNonInheritedData->m_shapeOutside != other.rareNonInheritedData->m_shapeOutside
             || rareNonInheritedData->m_clipPath != other.rareNonInheritedData->m_clipPath)
             return true;
     }
 
     return false;
 }
 
-bool RenderStyle::diffNeedsRecompositeLayer(const RenderStyle& other) const
-{
-    if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
-        if (rareNonInheritedData->m_transformStyle3D != other.rareNonInheritedData->m_transformStyle3D
-            || rareNonInheritedData->m_backfaceVisibility != other.rareNonInheritedData->m_backfaceVisibility
-            || rareNonInheritedData->m_perspective != other.rareNonInheritedData->m_perspective
-            || rareNonInheritedData->m_perspectiveOriginX != other.rareNonInheritedData->m_perspectiveOriginX
-            || rareNonInheritedData->m_perspectiveOriginY != other.rareNonInheritedData->m_perspectiveOriginY
-            || hasWillChangeCompositingHint() != other.hasWillChangeCompositingHint())
-            return true;
-    }
-
-    return false;
-}
-
 unsigned RenderStyle::computeChangedContextSensitiveProperties(const RenderStyle& other, StyleDifference diff) const
 {
     unsigned changedContextSensitiveProperties = ContextSensitivePropertyNone;
 
     // StyleAdjuster has ensured that zIndex is non-auto only if it's applicable.
     if (m_box->zIndex() != other.m_box->zIndex() || m_box->hasAutoZIndex() != other.m_box->hasAutoZIndex())
         changedContextSensitiveProperties |= ContextSensitivePropertyZIndex;
 
     if (rareNonInheritedData.get() != other.rareNonInheritedData.get()) {
         if (!transformDataEquivalent(other))
@@ skipping 1012 matching lines @@
     // right
     radiiSum = radii.topRight().height() + radii.bottomRight().height();
     if (radiiSum > rect.height())
         factor = std::min(rect.height() / radiiSum, factor);
 
     ASSERT(factor <= 1);
     return factor;
 }
 
 } // namespace WebCore