Issue #1234 + Clean up - CPluginTab (dead code, nullptr defect fix, etc.)

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 253 matching lines @@
   std::wstring documentUrl = GetDocumentUrl();
 
   if (isDocumentBrowser)
   {
     if (url != documentUrl)
     {
       SetDocumentUrl(url);
     }
     InjectABP(browser);
   }
-  CString urlLegacy = ToCString(url);
-  if (urlLegacy.Left(6) == "res://")
+  if (BeginsWith(url, L"res://"))
   {
     return;
   }
   // Get document
   CComPtr<IDispatch> pDocDispatch;
   HRESULT hr = browser->get_Document(&pDocDispatch);
   if (FAILED(hr) || !pDocDispatch)
   {
     return;
   }
@@ skipping 147 matching lines @@
           LogQueue::LogPluginError(pluginError.GetErrorCode(), pluginError.GetErrorId(), pluginError.GetErrorSubid(), pluginError.GetErrorDescription(), true, pluginError.GetProcessId(), pluginError.GetThreadId());
         }
 
         // Non-hanging sleep
         Sleep(50);
       }
 
       tabLoopIteration++;
   }
 }