ntp_snippets: default to staging API on dev/canary

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 396 matching lines @@
   MakeSuggestionsProviderWithoutInitialization() {
     scoped_refptr<base::SingleThreadTaskRunner> task_runner(
         base::ThreadTaskRunnerHandle::Get());
     scoped_refptr<net::TestURLRequestContextGetter> request_context_getter =
         new net::TestURLRequestContextGetter(task_runner.get());
 
     utils_.ResetSigninManager();
     auto suggestions_fetcher = base::MakeUnique<RemoteSuggestionsFetcher>(
         utils_.fake_signin_manager(), /*token_service=*/nullptr,
         std::move(request_context_getter), utils_.pref_service(), nullptr,
-        base::Bind(&ParseJson), kAPIKey, &user_classifier_);
+        base::Bind(&ParseJson), GetFetchEndpoint(version_info::Channel::STABLE),
+        kAPIKey, &user_classifier_);
     suggestions_fetcher_ = suggestions_fetcher.get();
 
     auto image_fetcher = base::MakeUnique<NiceMock<MockImageFetcher>>();
 
     image_fetcher_ = image_fetcher.get();
     EXPECT_CALL(*image_fetcher, SetImageFetcherDelegate(_));
     auto image_decoder = base::MakeUnique<FakeImageDecoder>();
     image_decoder_ = image_decoder.get();
     EXPECT_FALSE(observer_);
     observer_ = base::MakeUnique<FakeContentSuggestionsProviderObserver>();
@@ skipping 1386 matching lines @@
                          RemoteSuggestionsProvider::ProviderStatus)>::Call,
                      base::Unretained(&status_callback))));
 
   // Should be called when becoming disabled.
   EXPECT_CALL(status_callback,
               Call(RemoteSuggestionsProvider::ProviderStatus::INACTIVE));
   service->EnterState(RemoteSuggestionsProviderImpl::State::DISABLED);
 }
 
 }  // namespace ntp_snippets