Issue 1737 - ABP 1.3 for IE sometimes blocks navigation to the ad from Google search results

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 349 matching lines @@
       return nativeHr;
     }
     else if (CPluginSettings::GetInstance()->IsPluginEnabled() && !client->IsWhitelistedUrl(documentUrl))
     {
       if (tab->IsFrameCached(src))
       {
         m_contentType = ContentType::CONTENT_TYPE_SUBDOCUMENT;
       }
     }
   }
+  else if (!CPluginClass::HasTabs())
+  {
+    m_contentType = ContentType::CONTENT_TYPE_DOCUMENT;

[sergei, 2015/06/30 15:44:55]

If we decide to accept it, actually, I think that we should not even touch
`m_contentType` here rather return `nativeHr` because we are assuming that it's
a root document which is never blocked.

As well as JIC I would check that referrer is empty.

+  }
 
   if (IsFlashRequest(pszAdditionalHeaders))
   {
     m_contentType = ContentType::CONTENT_TYPE_OBJECT_SUBREQUEST;
   }
 
   if (pszAdditionalHeaders && *pszAdditionalHeaders && IsXmlHttpRequest(*pszAdditionalHeaders))
   {
     m_contentType = ContentType::CONTENT_TYPE_XMLHTTPREQUEST;
   }
@@ skipping 56 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);
 }