Moved the FakeDownloadItem to content/public/test.

chrome/browser/ntp_snippets/download_suggestions_provider_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 "chrome/browser/ntp_snippets/download_suggestions_provider.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/observer_list.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/test/simple_test_clock.h"
 #include "base/time/default_clock.h"
-#include "chrome/browser/ntp_snippets/fake_download_item.h"
 #include "components/ntp_snippets/category.h"
 #include "components/ntp_snippets/mock_content_suggestions_provider_observer.h"
 #include "components/ntp_snippets/offline_pages/offline_pages_test_utils.h"
 #include "components/offline_pages/core/client_namespace_constants.h"
 #include "components/prefs/testing_pref_service.h"
+#include "content/public/test/fake_download_item.h"
 #include "content/public/test/mock_download_item.h"
 #include "content/public/test/mock_download_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using content::DownloadItem;
+using content::FakeDownloadItem;
 using content::MockDownloadManager;
 using ntp_snippets::Category;
 using ntp_snippets::CategoryStatus;
 using ntp_snippets::ContentSuggestion;
 using ntp_snippets::ContentSuggestionsProvider;
 using ntp_snippets::MockContentSuggestionsProviderObserver;
 using ntp_snippets::test::CaptureDismissedSuggestions;
 using ntp_snippets::test::FakeOfflinePageModel;
 using offline_pages::ClientId;
 using offline_pages::OfflinePageItem;
-using test::FakeDownloadItem;
 using testing::_;
 using testing::AllOf;
 using testing::AnyNumber;
 using testing::ElementsAre;
 using testing::IsEmpty;
 using testing::Lt;
 using testing::Mock;
 using testing::Return;
 using testing::SizeIs;
 using testing::StrictMock;
@@ skipping 1057 matching lines @@
   // it has been visited recently.
   EXPECT_CALL(
       *observer(),
       OnNewSuggestions(_, downloads_category(),
                        UnorderedElementsAre(HasUrl("http://dummy.com/0"))));
   auto test_clock = base::MakeUnique<base::SimpleTestClock>();
   test_clock->SetNow(now);
   CreateProvider(/*show_assets=*/false, /*show_offline_pages=*/true,
                  std::move(test_clock));
 }