IDBFactoryBackend -> IndexedDBClient, remove indexeddb/chromium

Source/modules/indexeddb/IndexedDBClient.cpp

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "modules/indexeddb/IndexedDBClient.h"
+
+namespace WebCore {
+
+static CreateIndexedDBClient* idbClientCreateFunction = 0;
+
+void setIndexedDBClientCreateFunction(CreateIndexedDBClient createFunction)
+{
+    idbClientCreateFunction = createFunction;
+}
+
+PassRefPtr<IndexedDBClient> IndexedDBClient::create()
+{
+    ASSERT(idbClientCreateFunction);
+    // There's no reason why we need to allocate a new proxy each time, but
+    // there's also no strong reason not to.
+    return idbClientCreateFunction();
+}
+
+} // namespace WebCore