Snippets are enabled when search suggestions are enabled.

chrome/browser/ntp_snippets/ntp_snippets_service_factory.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 "chrome/browser/ntp_snippets/ntp_snippets_service_factory.h"
 
+#include "base/feature_list.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/suggestions/image_fetcher_impl.h"
 #include "chrome/browser/search/suggestions/suggestions_service_factory.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/common/channel_info.h"
+#include "chrome/common/pref_names.h"
 #include "components/browser_sync/browser/profile_sync_service.h"
 #include "components/image_fetcher/image_fetcher.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/ntp_snippets/ntp_snippets_fetcher.h"
 #include "components/ntp_snippets/ntp_snippets_scheduler.h"
 #include "components/ntp_snippets/ntp_snippets_service.h"
+#include "components/prefs/pref_service.h"
 #include "components/safe_json/safe_json_parser.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/version_info/version_info.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/storage_partition.h"
 #include "net/url_request/url_request_context_getter.h"
 
 #if defined(OS_ANDROID)
+#include "chrome/browser/android/chrome_feature_list.h"
 #include "chrome/browser/android/ntp/ntp_snippets_launcher.h"
 #endif  // OS_ANDROID
 
 using content::BrowserThread;
 using suggestions::ImageFetcherImpl;
 using suggestions::SuggestionsService;
 using suggestions::SuggestionsServiceFactory;
 
 // static
 NTPSnippetsServiceFactory* NTPSnippetsServiceFactory::GetInstance() {
@@ skipping 16 matching lines @@
   DependsOn(ProfileSyncServiceFactory::GetInstance());
   DependsOn(SigninManagerFactory::GetInstance());
   DependsOn(SuggestionsServiceFactory::GetInstance());
 }
 
 NTPSnippetsServiceFactory::~NTPSnippetsServiceFactory() {}
 
 KeyedService* NTPSnippetsServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   Profile* profile = Profile::FromBrowserContext(context);
+
+  // TODO(mvanouwerkerk): Move the enable logic into the service once we start
+  // observing pref changes.
+  bool enabled = profile->GetPrefs()->GetBoolean(prefs::kSearchSuggestEnabled);
+#if defined(OS_ANDROID)
+  enabled = enabled &&
+            base::FeatureList::IsEnabled(chrome::android::kNTPSnippetsFeature);
+#endif  // OS_ANDROID
+
   SigninManagerBase* signin_manager =
       SigninManagerFactory::GetForProfile(profile);
   OAuth2TokenService* token_service =
       ProfileOAuth2TokenServiceFactory::GetForProfile(profile);
   scoped_refptr<net::URLRequestContextGetter> request_context =
       content::BrowserContext::GetDefaultStoragePartition(context)->
             GetURLRequestContext();
   ProfileSyncService* sync_service =
       ProfileSyncServiceFactory::GetForProfile(profile);
   SuggestionsService* suggestions_service =
       SuggestionsServiceFactory::GetForProfile(profile);
 
   ntp_snippets::NTPSnippetsScheduler* scheduler = nullptr;
 #if defined(OS_ANDROID)
   scheduler = NTPSnippetsLauncher::Get();
 #endif  // OS_ANDROID
 
   scoped_refptr<base::SequencedTaskRunner> task_runner =
       BrowserThread::GetBlockingPool()
           ->GetSequencedTaskRunnerWithShutdownBehavior(
               base::SequencedWorkerPool::GetSequenceToken(),
               base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
 
   return new ntp_snippets::NTPSnippetsService(
-      profile->GetPrefs(), sync_service, suggestions_service, task_runner,
-      g_browser_process->GetApplicationLocale(), scheduler,
+      enabled, profile->GetPrefs(), sync_service, suggestions_service,
+      task_runner, g_browser_process->GetApplicationLocale(), scheduler,
       base::WrapUnique(new ntp_snippets::NTPSnippetsFetcher(
           signin_manager, token_service, request_context,
           base::Bind(&safe_json::SafeJsonParser::Parse),
           chrome::GetChannel() == version_info::Channel::STABLE)),
       base::WrapUnique(new ImageFetcherImpl(request_context.get())));
 }