Move session service and supervised users to buildflags.

chrome/browser/sessions/chrome_tab_restore_service_client.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/sessions/chrome_tab_restore_service_client.h"
 
 #include "build/build_config.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_service.h"
 #include "chrome/browser/sessions/session_service_factory.h"
@@ skipping 103 matching lines @@
 
 base::FilePath ChromeTabRestoreServiceClient::GetPathToSaveTo() {
   return profile_->GetPath();
 }
 
 GURL ChromeTabRestoreServiceClient::GetNewTabURL() {
   return GURL(chrome::kChromeUINewTabURL);
 }
 
 bool ChromeTabRestoreServiceClient::HasLastSession() {
-#if defined(ENABLE_SESSION_SERVICE)
+#if BUILDFLAG(ENABLE_SESSION_SERVICE)
   SessionService* session_service =
       SessionServiceFactory::GetForProfile(profile_);
   Profile::ExitType exit_type = profile_->GetLastSessionExitType();
   // The previous session crashed and wasn't restored, or was a forced
   // shutdown. Both of which won't have notified us of the browser close so
   // that we need to load the windows from session service (which will have
   // saved them).
   return (!profile_->restored_last_session() && session_service &&
           (exit_type == Profile::EXIT_CRASHED ||
            exit_type == Profile::EXIT_SESSION_ENDED));
 #else
   return false;
 #endif
 }
 
 void ChromeTabRestoreServiceClient::GetLastSession(
     const sessions::GetLastSessionCallback& callback,
     base::CancelableTaskTracker* tracker) {
   DCHECK(HasLastSession());
-#if defined(ENABLE_SESSION_SERVICE)
+#if BUILDFLAG(ENABLE_SESSION_SERVICE)
   SessionServiceFactory::GetForProfile(profile_)
       ->GetLastSession(callback, tracker);
 #endif
 }
 
 void ChromeTabRestoreServiceClient::OnTabRestored(const GURL& url) {
   RecordAppLaunch(profile_, url);
 }