Issue #3343 - Eliminate unescaping of URL

src/plugin/PluginWbPassThrough.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 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 307 matching lines @@
   return false;
 }
 
 STDMETHODIMP WBPassthruSink::BeginningTransaction(LPCWSTR szURL, LPCWSTR szHeaders, DWORD dwReserved, LPWSTR* pszAdditionalHeaders)
 {
   if (!szURL)
   {
     return E_POINTER;
   }
   std::wstring src = szURL;
-  UnescapeUrl(src);
   DEBUG_GENERAL(src);
 
   if (pszAdditionalHeaders)
   {
     *pszAdditionalHeaders = nullptr;
   }
 
   CComPtr<IHttpNegotiate> httpNegotiate;
   QueryServiceFromClient(&httpNegotiate);
   // This fills the pszAdditionalHeaders with more headers. One of which is the Referer header, which we need.
@@ skipping 30 matching lines @@
   if (IsFlashRequest(pszAdditionalHeaders))
   {
     m_contentType = ContentType::CONTENT_TYPE_OBJECT_SUBREQUEST;
   }
 
   if (pszAdditionalHeaders && *pszAdditionalHeaders && IsXmlHttpRequest(*pszAdditionalHeaders))
   {
     m_contentType = ContentType::CONTENT_TYPE_XMLHTTPREQUEST;
   }
 
-  if (client->ShouldBlock(szURL, m_contentType, m_boundDomain, /*debug flag but must be set*/true))
+  if (client->ShouldBlock(src, m_contentType, m_boundDomain, /*debug flag but must be set*/true))
   {
     // NOTE: Feeding custom HTML to Flash, instead of original object subrequest
     // doesn't have much sense. It also can manifest in unwanted result
     // like video being blocked (See https://issues.adblockplus.org/ticket/1669)
     // So we report blocked object subrequests as failed, not just empty HTML.
     m_isCustomResponse = m_contentType != ContentType::CONTENT_TYPE_OBJECT_SUBREQUEST;
     return E_ABORT;
   }
   return nativeHr;
 }
@@ skipping 44 matching lines @@
   }
 
   return OnStart(szUrl, pOIProtSink, pOIBindInfo, grfPI, dwReserved, m_spInternetProtocol);
 }
 
 STDMETHODIMP WBPassthru::Read(/* [in, out] */ void *pv,/* [in] */ ULONG cb,/* [out] */ ULONG *pcbRead)
 {
   WBPassthruSink* pSink = GetSink();
   return pSink->OnRead(pv, cb, pcbRead);
 }