Finalize backend for fetching more NTPSnippets.

components/ntp_snippets/content_suggestions_service_unittest.cc

Index: components/ntp_snippets/content_suggestions_service_unittest.cc
diff --git a/components/ntp_snippets/content_suggestions_service_unittest.cc b/components/ntp_snippets/content_suggestions_service_unittest.cc
index dd14b8bd6b7d398b06ace43278868f1e9ac7a4ba..3e4c37268168f7b1fdab50705266132f897acb83 100644
--- a/components/ntp_snippets/content_suggestions_service_unittest.cc
+++ b/components/ntp_snippets/content_suggestions_service_unittest.cc
@@ -88,7 +88,8 @@ class MockProvider : public ContentSuggestionsProvider {
                void(base::Time begin,
                     base::Time end,
                     const base::Callback<bool(const GURL& url)>& filter));
-  MOCK_METHOD2(FetchMore, void(const Category&, FetchedMoreCallback));
+  MOCK_METHOD3(Fetch,
+               void(const Category&, std::set<std::string>, FetchingCallback));
   MOCK_METHOD1(ClearCachedSuggestions, void(Category category));
   MOCK_METHOD2(GetDismissedSuggestionsForDebugging,
                void(Category category,
@@ -576,13 +577,14 @@ TEST_F(ContentSuggestionsServiceTest, ShouldForwardClearHistory) {
   service()->ClearHistory(begin, end, filter);
 }
 
-TEST_F(ContentSuggestionsServiceTest, ShouldForwardFetchMore) {
+TEST_F(ContentSuggestionsServiceTest, ShouldForwardFetch) {
   Category category = FromKnownCategory(KnownCategories::ARTICLES);
+  std::set<std::string> known_suggestions;
   MockProvider* provider = RegisterProvider(category);
   provider->FireCategoryStatusChangedWithCurrentStatus(category);
-  EXPECT_CALL(*provider, FetchMore(category, _));
-  service()->FetchMore(category,
-                       ContentSuggestionsService::FetchedMoreCallback());
+  EXPECT_CALL(*provider, Fetch(category, known_suggestions, _));
+  service()->Fetch(category, known_suggestions,
+                   ContentSuggestionsService::FetchingCallback());
 }
 
 TEST_F(ContentSuggestionsServiceTest, DismissAndRestoreCategory) {