[WIP] bindings: Introduce PropertyBag

Source/core/css/FontFace.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 118 matching lines @@
     : m_status(Unloaded)
 {
 }
 
 FontFace::FontFace(ExecutionContext* context, const AtomicString& family, const Dictionary& descriptors)
     : m_family(family)
     , m_status(Unloaded)
 {
     Document* document = toDocument(context);
     String value;
-    if (DictionaryHelper::get(descriptors, "style", value))
+    if (descriptors.get("style", value))
         setPropertyFromString(document, value, CSSPropertyFontStyle);
-    if (DictionaryHelper::get(descriptors, "weight", value))
+    if (descriptors.get("weight", value))
         setPropertyFromString(document, value, CSSPropertyFontWeight);
-    if (DictionaryHelper::get(descriptors, "stretch", value))
+    if (descriptors.get("stretch", value))
         setPropertyFromString(document, value, CSSPropertyFontStretch);
-    if (DictionaryHelper::get(descriptors, "unicodeRange", value))
+    if (descriptors.get("unicodeRange", value))
         setPropertyFromString(document, value, CSSPropertyUnicodeRange);
-    if (DictionaryHelper::get(descriptors, "variant", value))
+    if (descriptors.get("variant", value))
         setPropertyFromString(document, value, CSSPropertyFontVariant);
-    if (DictionaryHelper::get(descriptors, "featureSettings", value))
+    if (descriptors.get("featureSettings", value))
         setPropertyFromString(document, value, CSSPropertyWebkitFontFeatureSettings);
 }
 
 FontFace::~FontFace()
 {
 }
 
 String FontFace::style() const
 {
     return m_style ? m_style->cssText() : "normal";
@@ skipping 431 matching lines @@
     visitor->trace(m_cssFontFace);
     visitor->trace(m_callbacks);
 }
 
 bool FontFace::hadBlankText() const
 {
     return m_cssFontFace->hadBlankText();
 }
 
 } // namespace blink