TextIteratorAlgorithm should not force layout update in constructor.

third_party/WebKit/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 272 matching lines @@
 }
 
 template <typename Strategy>
 void VisibleSelectionTemplate<Strategy>::appendTrailingWhitespace()
 {
     DCHECK_EQ(m_granularity, WordGranularity);
     const EphemeralRangeTemplate<Strategy> searchRange = makeSearchRange(end());
     if (searchRange.isNull())
         return;
 
+    // TODO(dglazkov): The use of updateLayoutIgnorePendingStylesheets needs to be audited.
+    // see http://crbug.com/590369 for more details.
+    searchRange.startPosition().document()->updateLayoutIgnorePendingStylesheets();
+
     CharacterIteratorAlgorithm<Strategy> charIt(searchRange.startPosition(), searchRange.endPosition(), TextIteratorEmitsCharactersBetweenAllVisiblePositions);
     bool changed = false;
 
     for (; charIt.length(); charIt.advance(1)) {
         UChar c = charIt.characterAt(0);
         if ((!isSpaceOrNewline(c) && c != noBreakSpaceCharacter) || c == '\n')
             break;
         m_end = charIt.endPosition();
         changed = true;
     }
@@ skipping 664 matching lines @@
 {
     sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelectionInFlatTree* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 #endif