[Offline] Creates metadata store interface for offline pages

components/offline_pages/offline_page_model.cc

Index: components/offline_pages/offline_page_model.cc
diff --git a/components/offline_pages/offline_page_model.cc b/components/offline_pages/offline_page_model.cc
index afb51c9a3f0aa222fcef7baa62736ca98aa0ac2b..5fd54d0606ddc06c1a6dcddd0a7f0a642d91b040 100644
--- a/components/offline_pages/offline_page_model.cc
+++ b/components/offline_pages/offline_page_model.cc
@@ -6,11 +6,13 @@
 
 #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() {
@@ -29,4 +31,8 @@ std::vector<OfflinePageItem> OfflinePageModel::GetAllOfflinePages() {
   return std::vector<OfflinePageItem>();
 }
 
+OfflinePageMetadataStore* OfflinePageModel::GetStoreForTesting() {
+  return store_.get();
+}
+
 }  // namespace offline_pages