[bindings] Introduce ScriptValue.to<T> to convert to native values.

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 c6a959da76fdf85677005f12eb08917164b7eae4..fb4b868552042d43f96a8b856443fc32d8d87a47 100644
--- a/Source/modules/indexeddb/IDBObjectStore.cpp
+++ b/Source/modules/indexeddb/IDBObjectStore.cpp
@@ -155,7 +155,7 @@ IDBRequest* IDBObjectStore::put(ScriptState* scriptState, const ScriptValue& val
 
 IDBRequest* IDBObjectStore::put(ScriptState* scriptState, WebIDBPutMode putMode, IDBAny* source, const ScriptValue& value, const ScriptValue& keyValue, ExceptionState& exceptionState)
 {
-    IDBKey* key = keyValue.isUndefined() ? nullptr : scriptValueToIDBKey(scriptState->isolate(), keyValue);
+    IDBKey* key = keyValue.isUndefined() ? nullptr : keyValue.to<IDBKey*>(exceptionState);
     return put(scriptState, putMode, source, value, key, exceptionState);
 }