Remove dead StyleDifference::needsRecompositeLayer

Source/core/editing/SimplifyMarkupCommand.cpp

 /*
  * Copyright (C) 2012 Apple Computer, 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 59 matching lines @@
 
             if (!currentNode->renderer() || !currentNode->renderer()->isRenderInline() || toRenderInline(currentNode->renderer())->alwaysCreateLineBoxes())
                 continue;
 
             if (currentNode->firstChild() != currentNode->lastChild()) {
                 topNodeWithStartingStyle = 0;
                 break;
             }
 
             unsigned context;
-            if (currentNode->renderStyle()->visualInvalidationDiff(*startingStyle, context).hasNoChange() && !context)
+            if (!currentNode->renderStyle()->visualInvalidationDiff(*startingStyle, context).hasDifference() && !context)
                 topNodeWithStartingStyle = currentNode;
 
         }
         if (topNodeWithStartingStyle) {
             for (Node* node = startingNode; node != topNodeWithStartingStyle; node = node->parentNode())
                 nodesToRemove.append(node);
         }
     }
 
     // we perform all the DOM mutations at once.
@@ skipping 32 matching lines @@
 }
 
 void SimplifyMarkupCommand::trace(Visitor* visitor)
 {
     visitor->trace(m_firstNode);
     visitor->trace(m_nodeAfterLast);
     CompositeEditCommand::trace(visitor);
 }
 
 } // namespace WebCore