Split Dictionary's get and convert into DictionaryHelper.

Source/modules/indexeddb/IDBDatabase.cpp

Index: Source/modules/indexeddb/IDBDatabase.cpp
diff --git a/Source/modules/indexeddb/IDBDatabase.cpp b/Source/modules/indexeddb/IDBDatabase.cpp
index 174ee37d23e3eb1768b5c7d7d7e03f61bbc38833..994f0752c66bfe9e6fe8825de444d37acfa29fb8 100644
--- a/Source/modules/indexeddb/IDBDatabase.cpp
+++ b/Source/modules/indexeddb/IDBDatabase.cpp
@@ -26,6 +26,7 @@
 #include "config.h"
 #include "modules/indexeddb/IDBDatabase.h"
 
+#include "bindings/core/v8/DictionaryHelper.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "bindings/core/v8/Nullable.h"
@@ -203,12 +204,12 @@ IDBObjectStore* IDBDatabase::createObjectStore(const String& name, const Diction
     if (!options.isUndefinedOrNull()) {
         String keyPathString;
         Vector<String> keyPathArray;
-        if (options.get("keyPath", keyPathArray))
+        if (DictionaryHelper::get(options, "keyPath", keyPathArray))
             keyPath = IDBKeyPath(keyPathArray);
         else if (options.getWithUndefinedOrNullCheck("keyPath", keyPathString))
             keyPath = IDBKeyPath(keyPathString);
 
-        options.get("autoIncrement", autoIncrement);
+        DictionaryHelper::get(options, "autoIncrement", autoIncrement);
     }
 
     return createObjectStore(name, keyPath, autoIncrement, exceptionState);