message: Use TokenPartitionTree instead of VectorTree<UnwrappedLine>
diff: @@ -188,7 +188,7 @@ struct TreeUnwrapperTestData {
  // Iterates through UnwrappedLines and expected lines and verifies that they
  // are equal
  bool VerifyUnwrappedLines(std::ostream* stream,
  - const verible::VectorTree<UnwrappedLine>& uwlines,
  + const verible::TokenPartitionTree& uwlines,
  const TreeUnwrapperTestData& test_case) {
  std::ostringstream first_diff_stream;
  const auto diff = verible::DeepEqual(
  