[NTP Snippets] Persist non-article remote suggestions in the DB

components/ntp_snippets/remote/ntp_snippets_database_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/remote/ntp_snippets_database.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 27 matching lines @@
          lhs.publish_date() == rhs.publish_date() &&
          lhs.expiry_date() == rhs.expiry_date() &&
          lhs.source_index() == rhs.source_index() &&
          lhs.sources() == rhs.sources() && lhs.score() == rhs.score() &&
          lhs.is_dismissed() == rhs.is_dismissed();
 }
 
 namespace {
 
 std::unique_ptr<NTPSnippet> CreateTestSnippet() {
-  std::unique_ptr<NTPSnippet> snippet(new NTPSnippet("http://localhost"));
+  std::unique_ptr<NTPSnippet> snippet(new NTPSnippet("http://localhost",
+                                                     kArticlesRemoteId));
   snippet->add_source(
       SnippetSource(GURL("http://localhost"), "Publisher", GURL("http://amp")));
   return snippet;
 }
 
 MATCHER_P(SnippetEq, snippet, "") {
   return *arg == *snippet;
 }
 
 }  // namespace
@@ skipping 302 matching lines @@
   base::RunLoop().RunUntilIdle();
 
   // Make sure the images are gone.
   LoadExpectedImage(db(), "snippet-id-1", "");
   LoadExpectedImage(db(), "snippet-id-3", "");
   // Make sure the second still exists.
   LoadExpectedImage(db(), "snippet-id-2", "pretty-image-2");
 }
 
 }  // namespace ntp_snippets