Issue 4944 - Make creation of FilterEngine asynchronous.

test/WebRequest.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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
@@ skipping 76 matching lines @@
   ASSERT_EQ("text/plain", jsEngine->Evaluate("foo.responseHeaders['content-type'].substr(0, 10)")->AsString());
   ASSERT_EQ(AdblockPlus::WebRequest::NS_OK, jsEngine->Evaluate("foo.status")->AsInt());
   ASSERT_EQ(200, jsEngine->Evaluate("foo.responseStatus")->AsInt());
   ASSERT_EQ("[Adblock Plus ", jsEngine->Evaluate("foo.responseText.substr(0, 14)")->AsString());
   ASSERT_EQ("text/plain", jsEngine->Evaluate("foo.responseHeaders['content-type'].substr(0, 10)")->AsString());
   ASSERT_TRUE(jsEngine->Evaluate("foo.responseHeaders['location']")->IsUndefined());
 }
 
 TEST_F(DefaultWebRequestTest, XMLHttpRequest)
 {
-  AdblockPlus::FilterEngine filterEngine(jsEngine);
+  auto filterEngine = AdblockPlus::FilterEngine::Create(jsEngine);
 
   jsEngine->Evaluate("\
     var result;\
     var request = new XMLHttpRequest();\
     request.open('GET', 'https://easylist-downloads.adblockplus.org/easylist.txt');\
     request.setRequestHeader('X', 'Y');\
     request.setRequestHeader('X2', 'Y2');\
     request.overrideMimeType('text/plain');\
     request.addEventListener('load', function() {result = request.responseText;}, false);\
     request.addEventListener('error', function() {result = 'error';}, false);\
@@ skipping 39 matching lines @@
   {
     AdblockPlus::Sleep(200);
   } while (jsEngine->Evaluate("result")->IsUndefined());
   ASSERT_EQ(AdblockPlus::WebRequest::NS_ERROR_FAILURE, jsEngine->Evaluate("request.channel.status")->AsInt());
   ASSERT_EQ(0, jsEngine->Evaluate("request.status")->AsInt());
   ASSERT_EQ("error", jsEngine->Evaluate("result")->AsString());
   ASSERT_TRUE(jsEngine->Evaluate("request.getResponseHeader('Content-Type')")->IsNull());
 }
 
 #endif