Avoid creating consecutive whitespace renderers.

third_party/WebKit/Source/core/dom/Text.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 276 matching lines @@
     if (style.preserveNewline())
         return true;
 
     // childNeedsDistributionRecalc() here is rare, only happens JS calling surroundContents() etc. from DOMNodeInsertedIntoDocument etc.
     if (document().childNeedsDistributionRecalc())
         return true;
 
     const LayoutObject* prev = LayoutTreeBuilderTraversal::previousSiblingLayoutObject(*this);
     if (prev && prev->isBR()) // <span><br/> <br/></span>
         return false;
+    if (prev && prev->isText() && prev->node()->isTextNode() && toText(prev->node())->containsOnlyWhitespace())
+        return false;
 
     if (parent.isLayoutInline()) {
         // <span><div/> <div/></span>
         if (prev && !prev->isInline() && !prev->isOutOfFlowPositioned())
             return false;
     } else {
         if (parent.isLayoutBlock() && !parent.childrenInline() && (!prev || !prev->isInline()))
             return false;
 
         // Avoiding creation of a layoutObject for the text node is a non-essential memory optimization.
@@ skipping 131 matching lines @@
 {
     return create(document(), data);
 }
 
 DEFINE_TRACE(Text)
 {
     CharacterData::trace(visitor);
 }
 
 } // namespace blink