Add Length::isPercent and use it in tables.

third_party/WebKit/Source/core/layout/LayoutInline.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 700 matching lines @@
     if (InlineBox* firstBox = firstLineBoxIncludingCulling()) {
         topLeft = firstBox->topLeft();
     }
     return adjustedPositionRelativeTo(topLeft, parent).y();
 }
 
 static LayoutUnit computeMargin(const LayoutInline* layoutObject, const Length& margin)
 {
     if (margin.isFixed())
         return LayoutUnit(margin.value());
-    if (margin.hasPercent())
+    if (margin.isPercentOrCalc())
         return minimumValueForLength(margin, std::max(LayoutUnit(), layoutObject->containingBlock()->availableLogicalWidth()));
     return LayoutUnit();
 }
 
 LayoutRectOutsets LayoutInline::marginBoxOutsets() const
 {
     return LayoutRectOutsets(marginTop(), marginRight(), marginBottom(), marginLeft());
 }
 
 LayoutUnit LayoutInline::marginLeft() const
@@ skipping 631 matching lines @@
 void LayoutInline::invalidateDisplayItemClients(PaintInvalidationReason invalidationReason) const
 {
     ObjectPaintInvalidator paintInvalidator(*this);
     paintInvalidator.invalidateDisplayItemClient(*this, invalidationReason);
 
     for (InlineFlowBox* box = firstLineBox(); box; box = box->nextLineBox())
         paintInvalidator.invalidateDisplayItemClient(*box, invalidationReason);
 }
 
 } // namespace blink