wstring: remove wstring method from PlatformFile

base/platform_file_posix.cc

Index: base/platform_file_posix.cc
diff --git a/base/platform_file_posix.cc b/base/platform_file_posix.cc
index 00249aa11d951da6aa484fac0ae26218319fc19c..f84c163e7f221e916a49618c2482c10dc0f82dfa 100644
--- a/base/platform_file_posix.cc
+++ b/base/platform_file_posix.cc
@@ -134,12 +134,6 @@ PlatformFile CreatePlatformFile(const FilePath& name, int flags,
   return descriptor;
 }
 
-PlatformFile CreatePlatformFile(const std::wstring& name, int flags,
-                                bool* created) {
-  return CreatePlatformFile(FilePath::FromWStringHack(name), flags,
-                            created, NULL);
-}
-
 bool ClosePlatformFile(PlatformFile file) {
   return !close(file);
 }