[Offline] Creates metadata store interface for offline pages

components/offline_pages/offline_page_metadata_store.cc

Index: components/offline_pages/offline_page_metadata_store.cc
diff --git a/components/offline_pages/offline_page_metadata_store.cc b/components/offline_pages/offline_page_metadata_store.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e5cf0581652d6f6dbe9415993a26e2323a707fef
--- /dev/null
+++ b/components/offline_pages/offline_page_metadata_store.cc
@@ -0,0 +1,15 @@
+// Copyright 2015 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 "components/offline_pages/offline_page_metadata_store.h"
+
+namespace offline_pages {
+
+OfflinePageMetadataStore::OfflinePageMetadataStore() {
+}
+
+OfflinePageMetadataStore::~OfflinePageMetadataStore() {
+}
+
+}  // namespace offline_pages