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

Source/core/rendering/TextAutosizer.cpp

Index: Source/core/rendering/TextAutosizer.cpp
diff --git a/Source/core/rendering/TextAutosizer.cpp b/Source/core/rendering/TextAutosizer.cpp
index d34593f5fb20f1e238e980e52fa2b7a704e53b8d..d6f23bdbaca8d3ba46ee5ee687cb9c59fb33866d 100644
--- a/Source/core/rendering/TextAutosizer.cpp
+++ b/Source/core/rendering/TextAutosizer.cpp
@@ -446,12 +446,12 @@ bool TextAutosizer::contentHeightIsConstrained(const RenderBlock* container)
         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;