Add Length::isPercent and use it in tables.

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

 /**
  * Copyright (C) 2006, 2007, 2010 Apple Inc. All rights reserved.
  *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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 270 matching lines @@
 
     // We'd like to remove line-height if it's unnecessary because
     // overflow:scroll clips editing text by line-height.
     Length logicalHeight = startStyle.logicalHeight();
     // Here, we remove line-height if the INPUT fixed height is taller than the
     // line-height.  It's not the precise condition because logicalHeight
     // includes border and padding if box-sizing:border-box, and there are cases
     // in which we don't want to remove line-height with percent or calculated
     // length.
     // TODO(tkent): This should be done during layout.
-    if (logicalHeight.hasPercent() || (logicalHeight.isFixed() && logicalHeight.getFloatValue() > computedLineHeight))
+    if (logicalHeight.isPercentOrCalc() || (logicalHeight.isFixed() && logicalHeight.getFloatValue() > computedLineHeight))
         textBlockStyle->setLineHeight(ComputedStyle::initialLineHeight());
 
     textBlockStyle->setDisplay(BLOCK);
     textBlockStyle->setUnique();
 
     if (inputElement()->shouldRevealPassword())
         textBlockStyle->setTextSecurity(TSNONE);
 
     textBlockStyle->setOverflowX(OverflowScroll);
     // overflow-y:visible doesn't work because overflow-x:scroll makes a layer.
@@ skipping 75 matching lines @@
     // inner-editor element overflows the INPUT box intentionally, however it
     // shouldn't affect outside of the INPUT box.  So we ignore child overflow.
 }
 
 HTMLInputElement* LayoutTextControlSingleLine::inputElement() const
 {
     return toHTMLInputElement(node());
 }
 
 } // namespace blink