message: Rollback r337070.
  Someone simultaneously fixed the breakage it was designed to fix.
diff: @@ -5105,7 +5105,6 @@ lldb::Encoding ClangASTContext::GetEncoding(lldb::opaque_compiler_type_t type,
  .GetEncoding(count);
  case clang::Type::DependentSizedArray:
  case clang::Type::DependentSizedExtVector:
  - case clang::Type::DependentVector:
  case clang::Type::UnresolvedUsing:
  case clang::Type::Attributed:
  case clang::Type::TemplateTypeParm:
  @@ -5273,7 +5272,6 @@ lldb::Format ClangASTContext::GetFormat(lldb::opaque_compiler_type_t type) {
  .GetFormat();
  case clang::Type::DependentSizedArray:
  case clang::Type::DependentSizedExtVector:
  - case clang::Type::DependentVector:
  case clang::Type::UnresolvedUsing:
  case clang::Type::Attributed:
  case clang::Type::TemplateTypeParm:
  