Build pyauto on win

chrome/test/pyautolib/pyautolib.i

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Swig Interface for PyAuto.
 // PyAuto makes the Automation Proxy interface available in Python
 //
 // Running swig as:
 //   swig -python -c++ chrome/test/pyautolib/pyautolib.i
 // would generate pyautolib.py, pyautolib_wrap.cxx
@@ skipping 51 matching lines @@
 
 %feature("docstring",
          "Represent a file path. Call value() to get the string.") FilePath;
 class FilePath {
  public:
   %feature("docstring", "Get the string representation.") value;
 #ifdef SWIGWIN
   typedef std::wstring StringType;
 #else
   typedef std::string StringType;
-#endif  // OS_WIN
+#endif  // SWIGWIN
   const StringType& value() const;
   %feature("docstring", "Construct an empty FilePath or from a string.")
       FilePath;
   FilePath();
   explicit FilePath(const StringType& path);
 };
 
 class PyUITestSuite {
  public:
   PyUITestSuite(int argc, char** argv);
@@ skipping 20 matching lines @@
            "The list can be found at chrome/app/chrome_dll_resource.h. "
            "Note that this method just schedules the accelerator, but does "
            "not wait for it to actually finish doing anything."
            "Returns True on success.")
       ApplyAccelerator;
   bool ApplyAccelerator(int id, int window_index=0);
 
   // Get/fetch properties
   %feature("docstring",
            "Get the path to download directory.") GetDownloadDirectory;
-  std::string GetDownloadDirectory();
+  FilePath GetDownloadDirectory();
 
   %feature("docstring", "Get the path to profile directory.") user_data_dir;
   FilePath user_data_dir() const;
 
   %feature("docstring", "Set download shelf visibility for the given or "
            "first browser window.") SetDownloadShelfVisible;
   void SetDownloadShelfVisible(bool is_visible, int window_index=0);
 
   %feature("docstring", "Determine if the download shelf is visible in the "
            "given or first browser window.") IsDownloadShelfVisible;
@@ skipping 38 matching lines @@
   %feature("docstring", "Determine if the browser is running. "
            "Returns False if user closed the window or if the browser died")
       IsBrowserRunning;
   bool IsBrowserRunning();
 
   %feature("docstring", "Install an extension from the given file. Returns "
            "True if successfully installed and loaded.") InstallExtension;
   bool InstallExtension(const FilePath& crx_file);
 };