Rework the "rules for parsing dimension values" implementation

third_party/WebKit/Source/core/html/HTMLTableElement.cpp

 /*
  * 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, 2008, 2010, 2011 Apple Inc. All rights
  * reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 310 matching lines @@
           CSSImageValue::create(url, document().completeURL(url));
       imageValue->setReferrer(Referrer(document().outgoingReferrer(),
                                        document().getReferrerPolicy()));
       style->setProperty(CSSProperty(CSSPropertyBackgroundImage, *imageValue));
     }
   } else if (name == valignAttr) {
     if (!value.isEmpty())
       addPropertyToPresentationAttributeStyle(style, CSSPropertyVerticalAlign,
                                               value);
   } else if (name == cellspacingAttr) {
-    if (!value.isEmpty())
-      addHTMLLengthToStyle(style, CSSPropertyBorderSpacing, value);
+    if (!value.isEmpty()) {
+      addHTMLLengthToStyle(style, CSSPropertyBorderSpacing, value,
+                           DontAllowPercentageValues);
+    }
   } else if (name == alignAttr) {
     if (!value.isEmpty()) {
       if (equalIgnoringCase(value, "center")) {
         addPropertyToPresentationAttributeStyle(
             style, CSSPropertyWebkitMarginStart, CSSValueAuto);
         addPropertyToPresentationAttributeStyle(
             style, CSSPropertyWebkitMarginEnd, CSSValueAuto);
       } else {
         addPropertyToPresentationAttributeStyle(style, CSSPropertyFloat, value);
       }
@@ skipping 262 matching lines @@
 const AtomicString& HTMLTableElement::summary() const {
   return getAttribute(summaryAttr);
 }
 
 DEFINE_TRACE(HTMLTableElement) {
   visitor->trace(m_sharedCellStyle);
   HTMLElement::trace(visitor);
 }
 
 }  // namespace blink