Drop ntp_snippets::kStudyName in chrome://flags

components/ntp_snippets/remote/remote_suggestions_provider_impl_unittest.cc

 // Copyright 2015 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/remote_suggestions_provider_impl.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 381 matching lines @@
   MOCK_METHOD0(OnNTPOpened, void());
   MOCK_METHOD0(OnPersistentSchedulerWakeUp, void());
   MOCK_METHOD0(RescheduleFetching, void());
 };
 
 }  // namespace
 
 class RemoteSuggestionsProviderImplTest : public ::testing::Test {
  public:
   RemoteSuggestionsProviderImplTest()
-      : params_manager_(ntp_snippets::kStudyName,
+      : params_manager_(ntp_snippets::kArticleSuggestionsFeature.name,
                         {{"content_suggestions_backend",
                           kTestContentSuggestionsServerEndpoint}},
                         {ntp_snippets::kArticleSuggestionsFeature.name}),
         fake_url_fetcher_factory_(
             /*default_factory=*/&failing_url_fetcher_factory_),
         test_url_(kTestContentSuggestionsServerWithAPIKey),
         category_ranker_(base::MakeUnique<ConstantCategoryRanker>()),
         user_classifier_(/*pref_service=*/nullptr,
                          base::MakeUnique<base::DefaultClock>()),
         suggestions_fetcher_(nullptr),
@@ skipping 1399 matching lines @@
   WaitForSuggestionsProviderInitialization(service.get(),
                                            /*set_empty_response=*/true);
 
   // The scheduler should be notified of clearing the history.
   EXPECT_CALL(*scheduler(), OnSuggestionsCleared());
   service->OnStatusChanged(RemoteSuggestionsStatus::ENABLED_AND_SIGNED_OUT,
                            RemoteSuggestionsStatus::ENABLED_AND_SIGNED_IN);
 }
 
 }  // namespace ntp_snippets