[bindings] Remove custom namedPropertyEnumerator from CSSStyleDeclaration

Source/core/css/CSSStyleDeclaration.cpp

Index: Source/core/css/CSSStyleDeclaration.cpp
diff --git a/Source/core/css/CSSStyleDeclaration.cpp b/Source/core/css/CSSStyleDeclaration.cpp
index 712f2ddb0b4cfd7ca62dce3d5a76b7c2abed6402..9f11edad0c45abcea4acde5f40a6f9be390084fa 100644
--- a/Source/core/css/CSSStyleDeclaration.cpp
+++ b/Source/core/css/CSSStyleDeclaration.cpp
@@ -125,4 +125,25 @@ bool CSSStyleDeclaration::anonymousNamedSetter(ScriptState* scriptState, const S
     return true;
 }
 
+void CSSStyleDeclaration::namedPropertyEnumerator(Vector<String>& names, ExceptionState&)
+{
+    typedef Vector<String, numCSSProperties - 1> PreAllocatedPropertyVector;
+    DEFINE_STATIC_LOCAL(PreAllocatedPropertyVector, propertyNames, ());
+    static unsigned propertyNamesLength = 0;
+    if (propertyNames.isEmpty()) {
+        for (int id = firstCSSProperty; id <= lastCSSProperty; ++id) {
+            CSSPropertyID propertyId = static_cast<CSSPropertyID>(id);
+            if (CSSPropertyMetadata::isEnabledProperty(propertyId))
+                propertyNames.append(getJSPropertyName(propertyId));
+        }
+        std::sort(propertyNames.begin(), propertyNames.end(), codePointCompareLessThan);
+        propertyNamesLength = propertyNames.size();
+    }
+    for (unsigned i = 0; i < propertyNamesLength; ++i) {
+        String key = propertyNames.at(i);
+        ASSERT(!key.isNull());
+        names.append(key);
+    }
+}
+
 }