[Offline] Adding archiver interface

components/offline_pages/offline_page_model_unittest.cc

Index: components/offline_pages/offline_page_model_unittest.cc
diff --git a/components/offline_pages/offline_page_model_unittest.cc b/components/offline_pages/offline_page_model_unittest.cc
index b6119ef63209fa40460b64ddf0f7588ee7b5c76e..a43d64f9056a2bfdab973d138de515cda7482b85 100644
--- a/components/offline_pages/offline_page_model_unittest.cc
+++ b/components/offline_pages/offline_page_model_unittest.cc
@@ -38,12 +38,42 @@ void OfflinePageTestStore::RemoveOfflinePage(const GURL& page_url,
                                              const UpdateCallback& callback) {
 }
 
+class OfflinePageTestArchiver : public OfflinePageArchiver {
+ public:
+  ~OfflinePageTestArchiver() override;
+
+  // OfflinePageArchiver implementation:
+  Request CreateArchive(const GURL& url,
+                        const std::string& suggested_file_name,
+                        Client* client) override;
+  void CancelRequest(const Request& request) override;
+};
+
+OfflinePageTestArchiver::~OfflinePageTestArchiver() {
+}
+
+OfflinePageArchiver::Request OfflinePageTestArchiver::CreateArchive(
+    const GURL& url,
+    const std::string& suggested_file_name,
+    Client* client) {
+  return Request(url);
+}
+
+void OfflinePageTestArchiver::CancelRequest(
+    const OfflinePageArchiver::Request& request) {
+}
+
 class OfflinePageModelTest : public testing::Test {
  public:
   OfflinePageModelTest();
   ~OfflinePageModelTest() override;
 
   scoped_ptr<OfflinePageMetadataStore> BuildStore();
+
+  OfflinePageTestArchiver* archiver() { return &archiver_; }
+
+ private:
+  OfflinePageTestArchiver archiver_;
 };
 
 OfflinePageModelTest::OfflinePageModelTest() {
@@ -59,7 +89,7 @@ scoped_ptr<OfflinePageMetadataStore> OfflinePageModelTest::BuildStore() {
 TEST_F(OfflinePageModelTest, Initialize) {
   scoped_ptr<OfflinePageMetadataStore> store = BuildStore();
   OfflinePageMetadataStore* store_ptr = store.get();
-  OfflinePageModel model(store.Pass());
+  OfflinePageModel model(store.Pass(), archiver());
   EXPECT_EQ(store_ptr, model.GetStoreForTesting());
 }