Avoid allocating temporary ranges in connection with text and character iterators.

Source/core/editing/VisibleSelection.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 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 295 matching lines @@
     if (!searchRange)
         return;
 
     CharacterIterator charIt(searchRange.get(), TextIteratorEmitsCharactersBetweenAllVisiblePositions);
     bool changed = false;
 
     for (; charIt.length(); charIt.advance(1)) {
         UChar c = charIt.characterAt(0);
         if ((!isSpaceOrNewline(c) && c != noBreakSpace) || c == '\n')
             break;
-        m_end = charIt.range()->endPosition();
+        m_end = charIt.endPosition();
         changed = true;
     }
     if (changed)
         didChange();
 }
 
 void VisibleSelection::setBaseAndExtentToDeepEquivalents()
 {
     // Move the selection to rendered positions, if possible.
     bool baseAndExtentEqual = m_base == m_extent;
@@ skipping 539 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif