Rework the "rules for parsing dimension values" implementation

third_party/WebKit/Source/core/html/HTMLElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004-2007, 2009, 2014 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 104 matching lines @@
   int offsetLeftForBinding();
   int offsetTopForBinding();
   int offsetWidthForBinding();
   int offsetHeightForBinding();
 
   Element* unclosedOffsetParent();
 
  protected:
   HTMLElement(const QualifiedName& tagName, Document&, ConstructionType);
 
+  enum AllowPercentage { DontAllowPercentageValues, AllowPercentageValues };
   void addHTMLLengthToStyle(MutableStylePropertySet*,
                             CSSPropertyID,
-                            const String& value);
+                            const String& value,
+                            AllowPercentage = AllowPercentageValues);
   void addHTMLColorToStyle(MutableStylePropertySet*,
                            CSSPropertyID,
                            const String& color);
 
   void applyAlignmentAttributeToStyle(const AtomicString&,
                                       MutableStylePropertySet*);
   void applyBorderAttributeToStyle(const AtomicString&,
                                    MutableStylePropertySet*);
 
   void parseAttribute(const QualifiedName&,
@@ skipping 93 matching lines @@
   inline bool isElementOfType<const thisType>(const HTMLElement& element) {  \
     return is##thisType(element);                                            \
   }                                                                          \
   DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType)
 
 }  // namespace blink
 
 #include "core/HTMLElementTypeHelpers.h"
 
 #endif  // HTMLElement_h