[Offline] Adding archiver interface

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 5fd54d0606ddc06c1a6dcddd0a7f0a642d91b040..f357d7e3f5929b9ba7a5f7affd2c0621e1105346 100644
--- a/components/offline_pages/offline_page_model.cc
+++ b/components/offline_pages/offline_page_model.cc
@@ -11,18 +11,29 @@
 
 namespace offline_pages {
 
-OfflinePageModel::OfflinePageModel(scoped_ptr<OfflinePageMetadataStore> store)
-    : store_(store.Pass()) {
+OfflinePageModel::OfflinePageModel(scoped_ptr<OfflinePageMetadataStore> store,
+                                   OfflinePageArchiver* archiver)
+    : store_(store.Pass()),
+      archiver_(archiver) {
+  DCHECK(archiver);
 }
 
 OfflinePageModel::~OfflinePageModel() {
 }
 
 void OfflinePageModel::Shutdown() {
-  NOTIMPLEMENTED();
 }
 
 void OfflinePageModel::SavePageOffline(const GURL& url) {
+}
+
+void OfflinePageModel::OnCreateArchiveDone(
+    OfflinePageArchiver::Request* request,
+    OfflinePageArchiver::ArchiverResult result,
+    const base::FilePath& file_path) {
+  // TODO(fgorski): Match request against one of the expected requests
+  // TODO(fgorski): Create an entry in the offline pages metadata store for that
+  //                request.
   NOTIMPLEMENTED();
 }