Don't use std::string in the plugin, convert when communicating with the engine

src/plugin/AdblockPlusDomTraverser.cpp

 #include "PluginStdAfx.h"
 
 #include "PluginClient.h"
 #include "PluginFilter.h"
 #include "PluginSettings.h"
 
 #include "AdblockPlusDomTraverser.h"
 
 
 CPluginDomTraverser::CPluginDomTraverser(CPluginTab* tab) : CPluginDomTraverserBase(tab)
@@ skipping 94 matching lines @@
   }
 
   return true;
 }
 
 
 bool CPluginDomTraverser::IsEnabled()
 { 
   CPluginClient* client = CPluginClient::GetInstance();
 
-  return client && CPluginSettings::GetInstance()->IsPluginEnabled() && !client->IsWhitelistedUrl(ToUtf8String(std::wstring(m_domain)));
+  return client && CPluginSettings::GetInstance()->IsPluginEnabled() && !client->IsWhitelistedUrl(std::wstring(m_domain));
 }
 
 
 void CPluginDomTraverser::HideElement(IHTMLElement* pEl, const CString& type, const CString& url, bool isDebug, CString& indent)
 {
   CComPtr<IHTMLStyle> pStyle;
 
   if (SUCCEEDED(pEl->get_style(&pStyle)) && pStyle)
   {
     CComBSTR bstrDisplay;
@@ skipping 11 matching lines @@
 
 #ifdef ENABLE_DEBUG_RESULT
         if (isDebug)
         {
           CPluginDebug::DebugResultHiding(type, url, "-");
         }
 #endif // ENABLE_DEBUG_RESULT
     }
   }
 }