[WIP] bindings: Introduce PropertyBag

Source/core/css/FontFace.cpp

Index: Source/core/css/FontFace.cpp
diff --git a/Source/core/css/FontFace.cpp b/Source/core/css/FontFace.cpp
index c14801203761f92e65f8aebc9870a546b89862ca..32b22a08e2eaea515c63aeb20b9292b0cf7a38f5 100644
--- a/Source/core/css/FontFace.cpp
+++ b/Source/core/css/FontFace.cpp
@@ -136,17 +136,17 @@ FontFace::FontFace(ExecutionContext* context, const AtomicString& family, const
 {
     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);
 }