Add ClearHistory() to ContentSuggestionsService and its providers

components/ntp_snippets/content_suggestions_service_unittest.cc

 // Copyright 2016 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/ntp_snippets/content_suggestions_service.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 82 matching lines @@
   void FireCategoryStatusChangedWithCurrentStatus(Category category) {
     observer()->OnCategoryStatusChanged(this, category,
                                         statuses_[category.id()]);
   }
 
   void FireSuggestionInvalidated(Category category,
                                  const std::string& suggestion_id) {
     observer()->OnSuggestionInvalidated(this, category, suggestion_id);
   }
 
+  MOCK_METHOD3(ClearHistory,
+               void(base::Time begin,
+                    base::Time end,
+                    base::Callback<bool(const GURL& url)> filter));
   MOCK_METHOD1(ClearCachedSuggestions, void(Category category));
   MOCK_METHOD2(GetDismissedSuggestionsForDebugging,
                void(Category category,
                     const DismissedSuggestionsCallback& callback));
   MOCK_METHOD1(ClearDismissedSuggestionsForDebugging, void(Category category));
   MOCK_METHOD1(DismissSuggestion, void(const std::string& suggestion_id));
   MOCK_METHOD2(FetchSuggestionImage,
                void(const std::string& suggestion_id,
                     const ImageFetchedCallback& callback));
 
@@ skipping 445 matching lines @@
 
   // Same thing, but now the bookmarks category updates "naturally".
   bookmarks_provider->FireSuggestionsChanged(bookmarks, {1, 2});
   EXPECT_THAT(service()->GetCategories(), ElementsAre(bookmarks, remote));
   bookmarks_provider->FireSuggestionsChanged(bookmarks, {1});
   EXPECT_THAT(service()->GetCategories(), ElementsAre(bookmarks, remote));
   bookmarks_provider->FireSuggestionsChanged(bookmarks, std::vector<int>());
   EXPECT_THAT(service()->GetCategories(), ElementsAre(remote, bookmarks));
 }
 
+TEST_F(ContentSuggestionsServiceTest, ShouldForwardClearHistory) {
+  Category category = FromKnownCategory(KnownCategories::DOWNLOADS);
+  MockProvider* provider = RegisterProvider(category);
+  base::Time begin = base::Time::FromTimeT(123),
+             end = base::Time::FromTimeT(456);
+  EXPECT_CALL(*provider, ClearHistory(begin, end, _));
+  base::Callback<bool(const GURL& url)> filter;
+  service()->ClearHistory(begin, end, filter);
+}
+
 }  // namespace ntp_snippets