[Sync] Fix sync lint errors/includes, update presubmit.

chrome/browser/sync/glue/extensions_activity_monitor.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/sync/glue/extensions_activity_monitor.h"
 
 #include "components/sync/base/extensions_activity.h"
 #include "content/public/browser/browser_thread.h"
-#include "extensions/features/features.h"
 
 #if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/api/bookmarks/bookmarks_api.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/common/extension.h"
 #endif
 
 using content::BrowserThread;
 
@@ skipping 45 matching lines @@
   }
 #endif
 }
 
 const scoped_refptr<syncer::ExtensionsActivity>&
 ExtensionsActivityMonitor::GetExtensionsActivity() {
   return extensions_activity_;
 }
 
 }  // namespace browser_sync