[WIP] bindings: Introduce PropertyBag

Source/modules/indexeddb/IDBObjectStore.cpp

Index: Source/modules/indexeddb/IDBObjectStore.cpp
diff --git a/Source/modules/indexeddb/IDBObjectStore.cpp b/Source/modules/indexeddb/IDBObjectStore.cpp
index 13d6e0ef679730b8951710e795d1db6f44d01518..f834e4eb524a62a1431bbd6676eb6cfa8f191dfa 100644
--- a/Source/modules/indexeddb/IDBObjectStore.cpp
+++ b/Source/modules/indexeddb/IDBObjectStore.cpp
@@ -407,10 +407,10 @@ private:
 IDBIndex* IDBObjectStore::createIndex(ScriptState* scriptState, const String& name, const IDBKeyPath& keyPath, const Dictionary& options, ExceptionState& exceptionState)
 {
     bool unique = false;
-    DictionaryHelper::get(options, "unique", unique);
+    options.get("unique", unique);
 
     bool multiEntry = false;
-    DictionaryHelper::get(options, "multiEntry", multiEntry);
+    options.get("multiEntry", multiEntry);
 
     return createIndex(scriptState, name, keyPath, unique, multiEntry, exceptionState);
 }