Treat <table> widths of 0 as auto.

third_party/WebKit/Source/core/layout/LayoutTable.h

 /*
  * 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, 2009, 2010 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
@@ skipping 345 matching lines @@
     void paintMask(const PaintInfo&, const LayoutPoint&) const final;
 
     const CollapsedBorderValues& collapsedBorders() const
     {
         ASSERT(m_collapsedBordersValid);
         return m_collapsedBorders;
     }
 
     void subtractCaptionRect(LayoutRect&) const;
 
+    bool isLogicalWidthAuto() const;
+
     const char* name() const override { return "LayoutTable"; }
 
 protected:
     void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
     void simplifiedNormalFlowLayout() override;
     PaintInvalidationReason invalidatePaintIfNeeded(PaintInvalidationState&, const LayoutBoxModelObject& paintInvalidationContainer) override;
     void invalidatePaintOfSubtreesIfNeeded(PaintInvalidationState&) override;
 
 private:
     bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectTable || LayoutBlock::isOfType(type); }
@@ skipping 120 matching lines @@
     if (m_firstBody)
         return m_firstBody;
     return m_foot;
 }
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTable, isTable());
 
 } // namespace blink
 
 #endif // LayoutTable_h