Remove some unused variable assignments

Source/core/editing/ApplyStyleCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2008, 2009 Apple 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 1274 matching lines @@
                        Position(end.deprecatedNode(), end.deprecatedEditingOffset() + endOffsetAdjustment, Position::PositionIsOffsetInAnchor)); 
         return true;
     }
 
     return false;
 }
 
 bool ApplyStyleCommand::mergeEndWithNextIfIdentical(const Position& start, const Position& end)
 {
     Node* endNode = end.containerNode();
-    int endOffset = end.computeOffsetInContainerNode();
 
     if (isAtomicNode(endNode)) {
+        int endOffset = end.computeOffsetInContainerNode();
         if (offsetIsBeforeLastNodeOffset(endOffset, endNode))
             return false;
 
-        unsigned parentLastOffset = end.deprecatedNode()->parentNode()->childNodes()->length() - 1;
         if (end.deprecatedNode()->nextSibling())
             return false;
 
         endNode = end.deprecatedNode()->parentNode();
-        endOffset = parentLastOffset;
     }
 
     if (!endNode->isElementNode() || endNode->hasTagName(brTag))
         return false;
 
     Node* nextSibling = endNode->nextSibling();
     if (nextSibling && areIdenticalElements(endNode, nextSibling)) {
         Element* nextElement = static_cast<Element *>(nextSibling);
         Element* element = static_cast<Element *>(endNode);
         Node* nextChild = nextElement->firstChild();
@@ skipping 225 matching lines @@
         String textToMove = nextText->data();
         insertTextIntoNode(childText, childText->length(), textToMove);
         removeNode(next);
         // don't move child node pointer. it may want to merge with more text nodes.
     }
 
     updateStartEnd(newStart, newEnd);
 }
 
 }