[Offline] Creates metadata store interface for offline pages

components/offline_pages/offline_page_model.cc

 // 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_model.h"
 
 #include "base/logging.h"
 #include "components/offline_pages/offline_page_item.h"
+#include "components/offline_pages/offline_page_metadata_store.h"
 #include "url/gurl.h"
 
 namespace offline_pages {
 
-OfflinePageModel::OfflinePageModel() {
+OfflinePageModel::OfflinePageModel(scoped_ptr<OfflinePageMetadataStore> store)
+    : store_(store.Pass()) {
 }
 
 OfflinePageModel::~OfflinePageModel() {
 }
 
 void OfflinePageModel::Shutdown() {
   NOTIMPLEMENTED();
 }
 
 void OfflinePageModel::SavePageOffline(const GURL& url) {
   NOTIMPLEMENTED();
 }
 
 std::vector<OfflinePageItem> OfflinePageModel::GetAllOfflinePages() {
   NOTIMPLEMENTED();
   return std::vector<OfflinePageItem>();
 }
 
+OfflinePageMetadataStore* OfflinePageModel::GetStoreForTesting() {
+  return store_.get();
+}
+
 }  // namespace offline_pages