Minor optimization in FrameSelection::setNonDirectionalSelectionIfNeeded().

Source/core/editing/FrameSelection.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 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 179 matching lines @@
 }
 
 void FrameSelection::setNonDirectionalSelectionIfNeeded(const VisibleSelection& passedNewSelection, TextGranularity granularity,
     EndPointsAdjustmentMode endpointsAdjustmentMode)
 {
     VisibleSelection newSelection = passedNewSelection;
     bool isDirectional = shouldAlwaysUseDirectionalSelection(m_frame) || newSelection.isDirectional();
 
     VisiblePosition base = m_originalBase.isNotNull() ? m_originalBase : newSelection.visibleBase();
     VisiblePosition newBase = base;
-    VisiblePosition newExtent = newSelection.visibleExtent();
+    VisiblePosition extent = newSelection.visibleExtent();
+    VisiblePosition newExtent = extent;
     if (endpointsAdjustmentMode == AdjustEndpointsAtBidiBoundary)
         adjustEndpointsAtBidiBoundary(newBase, newExtent);
 
-    if (newBase != base || newExtent != newSelection.visibleExtent()) {
+    if (newBase != base || newExtent != extent) {
         m_originalBase = base;
         newSelection.setBase(newBase);
         newSelection.setExtent(newExtent);
     } else if (m_originalBase.isNotNull()) {
         if (m_selection.base() == newSelection.base())
             newSelection.setBase(m_originalBase);
         m_originalBase.clear();
     }
 
     newSelection.setIsDirectional(isDirectional); // Adjusting base and extent will make newSelection always directional
@@ skipping 1652 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const WebCore::FrameSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif