message: revert rL346478
  Summary:
  Reviewers:
  Subscribers:
diff: @@ -69,8 +69,8 @@ public:
  return std::error_code();
  }
  // Map any symlink to "/symlink".
  - std::error_code getRealPath(const Twine &Path, SmallVectorImpl<char> &Output,
  - bool ExpandTilde = false) const override {
  + std::error_code getRealPath(const Twine &Path,
  + SmallVectorImpl<char> &Output) const override {
  auto I = FilesAndDirs.find(Path.str());
  if (I == FilesAndDirs.end())
  return make_error_code(llvm::errc::no_such_file_or_directory);
  