Implement all shorthand property.

Source/core/css/StylePropertyShorthandCustom.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. 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 95 matching lines @@
     // The system fonts bypass the normal style resolution by using RenderTheme,
     // thus we need to special case it here. FIXME: This is a violation of CSS 3 Fonts
     // as we should still be able to change the longhands.
     // DON'T ADD ANY SHORTHAND HERE UNLESS IT ISN'T ALWAYS EXPANDED AT PARSE TIME (which is wrong).
     if (id == CSSPropertyFont)
         return false;
 
     return shorthandForProperty(id).length();
 }
 
+bool isExpandedShorthandForAll(CSSPropertyID propertyId)
+{
+    // FIXME: isExpandedShorthand says "font" is not an expanded shorthand,
+    // but font is expanded to font-family, font-size, and so on.
+    // StylePropertySerializer::asText should not generate css text like
+    // "font: initial; font-family: initial;...". To avoid this, we need to
+    // treat "font" as an expanded shorthand.
+    // And while applying "all" property, we cannot apply "font" property
+    // directly. This causes ASSERT crash, because StyleBuilder assume that
+    // all given properties are not expanded shorthands.
+    // "marker" has the same issue.
+    if (propertyId == CSSPropertyMarker || propertyId == CSSPropertyFont)
+        return true;
+    return shorthandForProperty(propertyId).length();
+}
+
 unsigned indexOfShorthandForLonghand(CSSPropertyID shorthandID, const Vector<StylePropertyShorthand, 4>& shorthands)
 {
     for (unsigned i = 0; i < shorthands.size(); ++i) {
         if (shorthands.at(i).id() == shorthandID)
             return i;
     }
     ASSERT_NOT_REACHED();
     return 0;
 }
 
 } // namespace WebCore