Issue 5180 - remove synchronous WebRequest interface and stop exposing of DefaultWebRequest

src/DefaultWebRequestDummy.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <AdblockPlus/DefaultWebRequest.h>
+#include "DefaultWebRequest.h"
 
 AdblockPlus::ServerResponse AdblockPlus::DefaultWebRequestSync::GET(
     const std::string& url, const HeaderList& requestHeaders) const
 {
   AdblockPlus::ServerResponse result;
   result.status = IWebRequest::NS_ERROR_FAILURE;
   result.responseStatus = 0;
   return result;
 }