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

src/plugin/PluginTabBase.cpp

 #include "PluginStdAfx.h"
 
 #include "PluginClient.h"
 #include "PluginSettings.h"
 #ifdef SUPPORT_CONFIG
 #include "PluginConfig.h"
 #endif
 #include "PluginTab.h"
 #include "PluginDomTraverser.h"
 #include "PluginClass.h"
@@ skipping 127 matching lines @@
 
 void CPluginTabBase::OnNavigate(const CString& url)
 {
   SetDocumentUrl(url);
 
 
 #ifdef SUPPORT_FRAME_CACHING
   ClearFrameCache(GetDocumentDomain());
 #endif
 
-  std::string domainString = CT2A(GetDocumentDomain());
+  std::wstring domainString = GetDocumentDomain();
   m_filter->LoadHideFilters(CPluginClient::GetInstance()->GetElementHidingSelectors(domainString));
 
 #ifdef SUPPORT_DOM_TRAVERSER
   m_traverser->ClearCache();
 #endif
 }
 
 void CPluginTabBase::OnDownloadComplete(IWebBrowser2* browser)
 {
 #ifdef SUPPORT_DOM_TRAVERSER
@@ skipping 284 matching lines @@
 
         // Non-hanging sleep
         Sleep(50);
       }
 
       tabLoopIteration++;
   }
 
   return 0;
 }