Share code for data path retrieval in engine and plugin

src/plugin/PluginSettings.h

 /**
 * This class contains all client functionality of the IE plugin
 *
 * Exception errors are tested by calls to ExceptionsTest from: Main ...
 */
 
 #ifndef _PLUGIN_SETTINGS_H_
 #define _PLUGIN_SETTINGS_H_
 
 
@@ skipping 59 matching lines @@
 
   CString m_tabNumber;
 
   CPluginSettings::TProperties m_properties;
 
   bool m_isDirty;
 
   CString m_settingsVersion;
   std::auto_ptr<CPluginIniFileW> m_settingsFile;
 
-  static WCHAR* s_dataPath;
-  static WCHAR* s_dataPathParent;
-
 
   static CComAutoCriticalSection s_criticalSectionLocal;
 #ifdef SUPPORT_WHITELIST
   static CComAutoCriticalSection s_criticalSectionDomainHistory;
 #endif
 
   bool m_isPluginSelftestEnabled;
 
   void Clear();
 
   // Private constructor used by the singleton pattern
   CPluginSettings();
 public:
 
   ~CPluginSettings();
 
   static CPluginSettings* s_instance;
 
   static bool s_isLightOnly;
   static bool HasInstance();
   static CPluginSettings* GetInstance();
 
   bool Read(bool bDebug=true);
   bool Write(bool bDebug=true);
 
-  static CString GetDataPathParent();
   static CString GetDataPath(const CString& filename=L"");
 
   static CString GetTempPath(const CString& filename=L"");
   static CString GetTempFile(const CString& prefix, const CString& extension=L"");
 
   bool Has(const CString& key) const;
   void Remove(const CString& key);
 
   CString GetPluginId();
 
@@ skipping 109 matching lines @@
   void SetSubscription(std::string language);
   void SetDefaultSubscription();
   CString GetSubscription();
   void RefreshFilterlist();
 
   std::vector<SubscriptionDescription> m_subscriptions;
 };
 
 
 #endif // _PLUGIN_SETTINGS_H_