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

Source/modules/indexeddb/IDBObjectStore.cpp

 /*
  * Copyright (C) 2010 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 137 matching lines @@
 }
 
 IDBRequest* IDBObjectStore::put(ScriptState* scriptState, const ScriptValue& value, const ScriptValue& key, ExceptionState& exceptionState)
 {
     IDB_TRACE("IDBObjectStore::put");
     return put(scriptState, WebIDBPutModeAddOrUpdate, IDBAny::create(this), value, key, exceptionState);
 }
 
 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);
 }
 
 IDBRequest* IDBObjectStore::put(ScriptState* scriptState, WebIDBPutMode putMode, IDBAny* source, const ScriptValue& value, IDBKey* key, ExceptionState& exceptionState)
 {
     if (isDeleted()) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::objectStoreDeletedErrorMessage);
         return 0;
     }
     if (m_transaction->isFinished() || m_transaction->isFinishing()) {
@@ skipping 500 matching lines @@
     }
     return IDBIndexMetadata::InvalidId;
 }
 
 WebIDBDatabase* IDBObjectStore::backendDB() const
 {
     return m_transaction->backendDB();
 }
 
 } // namespace blink