Fix "Only secure content is displayed" messages

src/plugin/PluginWbPassThrough.cpp

 #include "PluginStdAfx.h"
 
 #include "PluginWbPassThrough.h"
 #include "PluginClient.h"
 #include "PluginClientFactory.h"
 #ifdef SUPPORT_FILTER
 #include "PluginFilter.h"
 #endif
 #include "PluginSettings.h"
 #include "PluginClass.h"
@@ skipping 255 matching lines @@
         m_spInternetProtocolSink->ReportResult(INET_E_REDIRECT_FAILED, 0, L"res://mshtml.dll/blank.htm");
       }
 
       return INET_E_REDIRECT_FAILED;
     } 
     if ((isBlocked)) 
     {
       m_shouldBlock = true;
       BaseClass::OnStart(szUrl, pOIProtSink, pOIBindInfo, grfPI, dwReserved, pTargetProtocol);
       m_spInternetProtocolSink->ReportProgress(BINDSTATUS_MIMETYPEAVAILABLE, L"text/javascript");
-      m_spInternetProtocolSink->ReportResult(INET_E_REDIRECT_FAILED, 0, L"res://mshtml.dll/blank.htm");
+      m_spInternetProtocolSink->ReportResult(INET_E_REDIRECT_FAILED, 0, L"data:");
 
       return INET_E_REDIRECT_FAILED;
     }
   }
 #endif // SUPPORT_FILTER
 
   return isBlocked ? S_FALSE : BaseClass::OnStart(szUrl, pOIProtSink, pOIBindInfo, grfPI, dwReserved, pTargetProtocol);
 }
 
 
@@ skipping 80 matching lines @@
   CComPtr<IHttpNegotiate> spHttpNegotiate;
   QueryServiceFromClient(&spHttpNegotiate);
 
   return spHttpNegotiate ? spHttpNegotiate->OnResponse(dwResponseCode, szResponseHeaders, szRequestHeaders, pszAdditionalRequestHeaders) : S_OK;
 }
 
 STDMETHODIMP WBPassthruSink::ReportProgress(ULONG ulStatusCode, LPCWSTR szStatusText)
 {
   return m_spInternetProtocolSink ? m_spInternetProtocolSink->ReportProgress(ulStatusCode, szStatusText) : S_OK;
 }