Make it possible to build without enable_supervised_users.

chrome/browser/ntp_tiles/chrome_most_visited_sites_factory.cc

 // Copyright 2013 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_tiles/chrome_most_visited_sites_factory.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/favicon/favicon_service_factory.h"
 #include "chrome/browser/favicon/large_icon_service_factory.h"
 #include "chrome/browser/history/top_sites_factory.h"
 #include "chrome/browser/ntp_tiles/chrome_popular_sites_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/suggestions/image_decoder_impl.h"
 #include "chrome/browser/search/suggestions/suggestions_service_factory.h"
-#include "chrome/browser/supervised_user/supervised_user_service.h"
-#include "chrome/browser/supervised_user/supervised_user_service_factory.h"
-#include "chrome/browser/supervised_user/supervised_user_service_observer.h"
-#include "chrome/browser/supervised_user/supervised_user_url_filter.h"
 #include "chrome/browser/thumbnails/thumbnail_list_source.h"
+#include "chrome/common/features.h"
 #include "components/history/core/browser/top_sites.h"
 #include "components/image_fetcher/core/image_fetcher_impl.h"
 #include "components/ntp_tiles/icon_cacher_impl.h"
 #include "components/ntp_tiles/metrics.h"
 #include "components/ntp_tiles/most_visited_sites.h"
 
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
+#include "chrome/browser/supervised_user/supervised_user_service.h"
+#include "chrome/browser/supervised_user/supervised_user_service_factory.h"
+#include "chrome/browser/supervised_user/supervised_user_service_observer.h"
+#include "chrome/browser/supervised_user/supervised_user_url_filter.h"
+#endif
+
 using suggestions::SuggestionsServiceFactory;
 
 namespace {
 
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
 class SupervisorBridge : public ntp_tiles::MostVisitedSitesSupervisor,
                          public SupervisedUserServiceObserver {
  public:
   explicit SupervisorBridge(Profile* profile);
   ~SupervisorBridge() override;
 
   void SetObserver(Observer* observer) override;
   bool IsBlocked(const GURL& url) override;
   std::vector<MostVisitedSitesSupervisor::Whitelist> whitelists() override;
   bool IsChildProfile() override;
@@ skipping 51 matching lines @@
 
 bool SupervisorBridge::IsChildProfile() {
   return profile_->IsChild();
 }
 
 void SupervisorBridge::OnURLFilterChanged() {
   if (supervisor_observer_) {
     supervisor_observer_->OnBlockedSitesChanged();
   }
 }
+#endif  // BUILDFLAG(ENABLE_SUPERVISED_USERS)
 
 }  // namespace
 
 // static
 std::unique_ptr<ntp_tiles::MostVisitedSites>
 ChromeMostVisitedSitesFactory::NewForProfile(Profile* profile) {
   // MostVisitedSites doesn't exist in incognito profiles.
   if (profile->IsOffTheRecord()) {
     return nullptr;
   }
 
   return base::MakeUnique<ntp_tiles::MostVisitedSites>(
       profile->GetPrefs(), TopSitesFactory::GetForProfile(profile),
       SuggestionsServiceFactory::GetForProfile(profile),
 #if defined(OS_ANDROID)
       ChromePopularSitesFactory::NewForProfile(profile),
 #else
       nullptr,
 #endif
       base::MakeUnique<ntp_tiles::IconCacherImpl>(
           FaviconServiceFactory::GetForProfile(
               profile, ServiceAccessType::IMPLICIT_ACCESS),
           LargeIconServiceFactory::GetForBrowserContext(profile),
           base::MakeUnique<image_fetcher::ImageFetcherImpl>(
               base::MakeUnique<suggestions::ImageDecoderImpl>(),
               profile->GetRequestContext())),
-      base::MakeUnique<SupervisorBridge>(profile));
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
+      base::MakeUnique<SupervisorBridge>(profile)
+#else
+      nullptr
+#endif
+          );
 }