Port more of url_request_unittest.cc....

base/file_util_posix.cc

Index: base/file_util_posix.cc
===================================================================
--- base/file_util_posix.cc	(revision 4466)
+++ base/file_util_posix.cc	(working copy)
@@ -311,9 +311,9 @@
   return true;
 }
 
-bool GetFileInfo(const std::wstring& file_path, FileInfo* results) {
+bool GetFileInfo(const FilePath& file_path, FileInfo* results) {
   struct stat64 file_info;
-  if (stat64(WideToUTF8(file_path).c_str(), &file_info) != 0)
+  if (stat64(file_path.value().c_str(), &file_info) != 0)
     return false;
   results->is_directory = S_ISDIR(file_info.st_mode);
   results->size = file_info.st_size;