Remove isInternalProperty

Source/core/css/StylePropertySerializer.cpp

Index: Source/core/css/StylePropertySerializer.cpp
diff --git a/Source/core/css/StylePropertySerializer.cpp b/Source/core/css/StylePropertySerializer.cpp
index d59e764ef6661f0c71257e8687ac2cc077ed1ef7..e5098788c458cd9dba198537d6e18f4c7daf2d3c 100644
--- a/Source/core/css/StylePropertySerializer.cpp
+++ b/Source/core/css/StylePropertySerializer.cpp
@@ -111,9 +111,6 @@ bool StylePropertySerializer::StylePropertySetForSerializer::shouldProcessProper
     // and so on) either.
     if (isShorthandProperty(propertyID) || propertyID == CSSPropertyAll)
         return false;
-    // We should not serialize internal properties.
-    if (isInternalProperty(propertyID))
-        return false;
 
     // The all property is a shorthand that resets all CSS properties except
     // direction and unicode-bidi. It only accepts the CSS-wide keywords.
@@ -203,8 +200,8 @@ String StylePropertySerializer::asText() const
 
         StylePropertySerializer::PropertyValueForSerializer property = m_propertySet.propertyAt(n);
         CSSPropertyID propertyID = property.id();
-        // Only enabled or internal properties should be part of the style.
-        ASSERT(CSSPropertyMetadata::isEnabledProperty(propertyID) || isInternalProperty(propertyID));
+        // Only enabled properties should be part of the style.
+        ASSERT(CSSPropertyMetadata::isEnabledProperty(propertyID));
         CSSPropertyID shorthandPropertyID = CSSPropertyInvalid;
         CSSPropertyID borderFallbackShorthandProperty = CSSPropertyInvalid;
         String value;