Snippets are enabled when search suggestions are enabled.

components/ntp_snippets/ntp_snippets_service_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/ntp_snippets_service.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 224 matching lines @@
   void CreateSnippetsService(bool enabled) {
     if (service_)
       service_->Shutdown();
 
     scoped_refptr<base::SingleThreadTaskRunner> task_runner(
         base::ThreadTaskRunnerHandle::Get());
     scoped_refptr<net::TestURLRequestContextGetter> request_context_getter =
         new net::TestURLRequestContextGetter(task_runner.get());
 
     service_.reset(new NTPSnippetsService(
-        pref_service_.get(), nullptr, task_runner, std::string("fr"),
+        enabled, pref_service_.get(), nullptr, task_runner, std::string("fr"),
         &scheduler_,
         base::WrapUnique(new NTPSnippetsFetcher(
             fake_signin_manager_.get(), fake_token_service_.get(),
             std::move(request_context_getter), base::Bind(&ParseJson),
             /*is_stable_channel=*/true)),
         /*image_fetcher=*/nullptr));
-    service_->Init(enabled);
+    service_->Init();
   }
 
  protected:
   const GURL& test_url() { return test_url_; }
   NTPSnippetsService* service() { return service_.get(); }
   MockScheduler& mock_scheduler() {  return scheduler_; }
 
   void LoadFromJSONString(const std::string& json) {
     fake_url_fetcher_factory_.SetFakeResponse(test_url_, json, net::HTTP_OK,
                                               net::URLRequestStatus::SUCCESS);
@@ skipping 580 matching lines @@
   LoadFromJSONString(base::StringPrintf(
       kChromeReaderResponseMultipleUrls, url_aol.c_str(),
       NTPSnippet::TimeToJsonString(GetDefaultCreationTime()).c_str(),
       NTPSnippet::TimeToJsonString(base::Time::Now() +
                                    base::TimeDelta::FromHours(1))
           .c_str()));
   ASSERT_THAT(service()->snippets(), IsEmpty());
 }
 
 }  // namespace ntp_snippets