Issue 1793 - check whether the frame is whitelisted before injecting CSS

src/plugin/PluginTabBase.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 206 matching lines @@
     // https://msdn.microsoft.com/en-us/library/aa752136(v=vs.85).aspx
     if (parentDispatch.IsEqualObject(&browser))
     {
       return nullptr;
     }
     ATL::CComQIPtr<IServiceProvider> parentDocumentServiceProvider = parentDispatch;
     if (!parentDocumentServiceProvider)
     {
       return nullptr;
     }
-    ATL::CComPtr<IWebBrowser2> webBrowser;
-    if (FAILED(parentDocumentServiceProvider->QueryService(SID_SWebBrowserApp, &webBrowser)))
+    ATL::CComPtr<IWebBrowser2> parentBrowser;
+    if (FAILED(parentDocumentServiceProvider->QueryService(SID_SWebBrowserApp, &parentBrowser)))
     {
       return nullptr;
     }
-    return webBrowser;
+    return parentBrowser;
   }
 
   bool IsFrameWhiteListed(ATL::CComPtr<IWebBrowser2> frame)
   {
     if (!frame)
     {
       return false;
     }
     auto url = GetLocationUrl(*frame);
     std::vector<std::string> frameHierarchy;
@@ skipping 189 matching lines @@
           LogQueue::LogPluginError(pluginError.GetErrorCode(), pluginError.GetErrorId(), pluginError.GetErrorSubid(), pluginError.GetErrorDescription(), true, pluginError.GetProcessId(), pluginError.GetThreadId());
         }
 
         // Non-hanging sleep
         Sleep(50);
       }
 
       tabLoopIteration++;
   }
 }