Add Length::isPercent and use it in tables.

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

Index: third_party/WebKit/Source/core/layout/LayoutReplaced.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutReplaced.cpp b/third_party/WebKit/Source/core/layout/LayoutReplaced.cpp
index 2d0d6faab4376724cb9ad9c7079bdf86e7c7b652..9cf1e4c7b6dd7e179d7d60599d8be280ac0cd409 100644
--- a/third_party/WebKit/Source/core/layout/LayoutReplaced.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutReplaced.cpp
@@ -669,13 +669,13 @@ void LayoutReplaced::computePreferredLogicalWidths()
     // We cannot resolve some logical width here (i.e. percent, fill-available or fit-content)
     // as the available logical width may not be set on our containing block.
     const Length& logicalWidth = style()->logicalWidth();
-    if (logicalWidth.hasPercent() || logicalWidth.isFillAvailable() || logicalWidth.isFitContent())
+    if (logicalWidth.isPercentOrCalc() || logicalWidth.isFillAvailable() || logicalWidth.isFitContent())
         computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
     else
         m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeReplacedLogicalWidth(ComputePreferred);
 
     const ComputedStyle& styleToUse = styleRef();
-    if (styleToUse.logicalWidth().hasPercent() || styleToUse.logicalMaxWidth().hasPercent())
+    if (styleToUse.logicalWidth().isPercentOrCalc() || styleToUse.logicalMaxWidth().isPercentOrCalc())
         m_minPreferredLogicalWidth = LayoutUnit();
 
     if (styleToUse.logicalMinWidth().isFixed() && styleToUse.logicalMinWidth().value() > 0) {