Text Autosizing: Treat position:absolute/fixed as constrained height.

Source/core/rendering/TextAutosizer.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 428 matching lines @@
 
 bool TextAutosizer::contentHeightIsConstrained(const RenderBlock* container)
 {
     // FIXME: Propagate constrainedness down the tree, to avoid inefficiently walking back up from each box.
     // FIXME: This code needs to take into account vertical writing modes.
     // FIXME: Consider additional heuristics, such as ignoring fixed heights if the content is already overflowing before autosizing kicks in.
     for (; container; container = container->containingBlock()) {
         RenderStyle* style = container->style();
         if (style->overflowY() >= OSCROLL)
             return false;
-        if (style->height().isSpecified() || style->maxHeight().isSpecified()) {
+        if (style->height().isSpecified() || style->maxHeight().isSpecified() || container->isOutOfFlowPositioned()) {
             // Some sites (e.g. wikipedia) set their html and/or body elements to height:100%,
             // without intending to constrain the height of the content within them.
             return !container->isRoot() && !container->isBody();
         }
-        if (container->isFloatingOrOutOfFlowPositioned())
+        if (container->isFloating())
             return false;
     }
     return false;
 }
 
 bool TextAutosizer::clusterShouldBeAutosized(TextAutosizingClusterInfo& clusterInfo, float blockWidth)
 {
     Vector<TextAutosizingClusterInfo> clusterInfos(1, clusterInfo);
     return compositeClusterShouldBeAutosized(clusterInfos, blockWidth);
 }
@@ skipping 147 matching lines @@
         if (i + 1 < clusterInfos.size()) {
             float currentWidth = clusterInfos[i].root->contentLogicalWidth();
             float nextWidth = clusterInfos[i + 1].root->contentLogicalWidth();
             if (currentWidth - nextWidth > maxWidthDifferenceWithinGroup)
                 groups.grow(groups.size() + 1);
         }
     }
 }
 
 } // namespace WebCore