Ensure cell's replaced content doesn't get the wrong width

third_party/WebKit/Source/core/layout/LayoutTableCell.cpp

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (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
@@ skipping 191 matching lines @@
 }
 
 void LayoutTableCell::ComputePreferredLogicalWidths() {
   // The child cells rely on the grids up in the sections to do their
   // computePreferredLogicalWidths work.  Normally the sections are set up
   // early, as table cells are added, but relayout can cause the cells to be
   // freed, leaving stale pointers in the sections' grids. We must refresh those
   // grids before the child cells try to use them.
   Table()->RecalcSectionsIfNeeded();
 
+  // We don't want the preferred width from children to be affected by any
+  // notional height on the cell, such as can happen when a percent sized image
+  // scales up its width to match the available height. Setting a zero override
+  // height prevents this from happening.
+  LayoutUnit content_height = HasOverrideLogicalContentHeight()
+                                  ? OverrideLogicalContentHeight()
+                                  : LayoutUnit(-1);
+  if (content_height > -1)
+    SetOverrideLogicalContentHeight(LayoutUnit());
   LayoutBlockFlow::ComputePreferredLogicalWidths();
+  if (content_height > -1)
+    SetOverrideLogicalContentHeight(content_height);
+
   if (GetNode() && Style()->AutoWrap()) {
     // See if nowrap was set.
     Length w = StyleOrColLogicalWidth();
     const AtomicString& nowrap = ToElement(GetNode())->getAttribute(nowrapAttr);
     if (!nowrap.IsNull() && w.IsFixed()) {
       // Nowrap is set, but we didn't actually use it because of the fixed width
       // set on the cell. Even so, it is a WinIE/Moz trait to make the minwidth
       // of the cell into the fixed width. They do this even in strict mode, so
       // do not make this a quirk. Affected the top of hiptop.com.
       min_preferred_logical_width_ =
@@ skipping 1260 matching lines @@
 
   return LayoutBlock::HasLineIfEmpty();
 }
 
 PaintInvalidationReason LayoutTableCell::InvalidatePaint(
     const PaintInvalidatorContext& context) const {
   return TableCellPaintInvalidator(*this, context).InvalidatePaint();
 }
 
 }  // namespace blink