Share code for data path retrieval in engine and plugin

src/shared/Utils.cpp

-#include "stdafx.h"
+#include <Windows.h>
+#include <ShlObj.h>
+
 #include "Utils.h"
 
 namespace
 {
-  static std::wstring appDataPath;
+  std::wstring appDataPath;
 
   bool IsWindowsVistaOrLater()
   {
     OSVERSIONINFOEX osvi;
     ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
     osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
     GetVersionEx(reinterpret_cast<LPOSVERSIONINFO>(&osvi));
     return osvi.dwMajorVersion >= 6;
   }
 }
@@ skipping 10 matching lines @@
       appDataPath.assign(pathBuffer);
       CoTaskMemFree(pathBuffer);
     }
     else
     {
       std::auto_ptr<wchar_t> pathBuffer(new wchar_t[MAX_PATH]);
       if (!SHGetSpecialFolderPath(0, pathBuffer.get(), CSIDL_LOCAL_APPDATA, true))
         throw std::runtime_error("Unable to find app data directory");
       appDataPath.assign(pathBuffer.get());
     }
-    appDataPath += L"\\AdblockPlus";
+    appDataPath += L"\\Adblock Plus for IE";
+
+    // Ignore errors here, this isn't a critical operation
+    ::CreateDirectoryW(appDataPath.c_str(), NULL);
   }
   return appDataPath;
 }