Add Length::isPercent and use it in tables.

third_party/WebKit/Source/core/paint/BackgroundImageGeometry.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/BackgroundImageGeometry.h"
 
 #include "core/frame/FrameView.h"
 #include "core/layout/LayoutBox.h"
 #include "core/layout/LayoutBoxModelObject.h"
 #include "core/layout/LayoutView.h"
@@ skipping 45 matching lines @@
     LayoutSize imageIntrinsicSize = image->imageSize(obj, obj.style()->effectiveZoom(), positioningAreaSize);
     switch (type) {
     case SizeLength: {
         LayoutSize tileSize(positioningAreaSize);
 
         Length layerWidth = fillLayer.size().size.width();
         Length layerHeight = fillLayer.size().size.height();
 
         if (layerWidth.isFixed())
             tileSize.setWidth(LayoutUnit(layerWidth.value()));
-        else if (layerWidth.hasPercent())
+        else if (layerWidth.isPercentOrCalc())
             tileSize.setWidth(valueForLength(layerWidth, positioningAreaSize.width()));
 
         if (layerHeight.isFixed())
             tileSize.setHeight(LayoutUnit(layerHeight.value()));
-        else if (layerHeight.hasPercent())
+        else if (layerHeight.isPercentOrCalc())
             tileSize.setHeight(valueForLength(layerHeight, positioningAreaSize.height()));
 
         // If one of the values is auto we have to use the appropriate
         // scale to maintain our aspect ratio.
         if (layerWidth.isAuto() && !layerHeight.isAuto()) {
             if (imageIntrinsicSize.height()) {
                 LayoutUnit adjustedWidth = imageIntrinsicSize.width() * tileSize.height() / imageIntrinsicSize.height();
                 if (imageIntrinsicSize.width() >= 1 && adjustedWidth < 1)
                     adjustedWidth = LayoutUnit(1);
                 tileSize.setWidth(adjustedWidth);
@@ skipping 333 matching lines @@
         useFixedAttachment(paintRect.location());
 
     // Clip the final output rect to the paint rect
     m_destRect.intersect(paintRect);
 
     // Snap as-yet unsnapped values.
     setDestRect(LayoutRect(pixelSnappedIntRect(m_destRect)));
 }
 
 } // namespace blink