LibWeb: Make HTMLToken::{Position,AttributeBuilder} structs public

There was and is no reason for those to be private. Making them public
also allows us to explicitly specify the return type of some getters.

Userland/Libraries/LibWeb/HTML/Parser/HTMLToken.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2020, Andreas Kling <[email protected]>
+ * Copyright (c) 2021, Max Wipfli <[email protected]>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -29,6 +30,22 @@ class HTMLToken {
  EndOfFile,
  };
 
+ struct Position {
+ size_t line { 0 };
+ size_t column { 0 };
+ };
+
+ struct AttributeBuilder {
+ String prefix;
+ String local_name;
+ String namespace_;
+ String value;
+ Position name_start_position;
+ Position value_start_position;
+ Position name_end_position;
+ Position value_end_position;
+ };
+
  static HTMLToken make_character(u32 code_point)
  {
  HTMLToken token;
@@ -158,32 +175,16 @@ class HTMLToken {
 
  String to_string() const;
 
- auto const& start_position() const { return m_start_position; }
- auto const& end_position() const { return m_end_position; }
+ Position const& start_position() const { return m_start_position; }
+ Position const& end_position() const { return m_end_position; }
 
- auto const& attributes() const
+ Vector<Attribute> const& attributes() const
  {
  VERIFY(is_start_tag() || is_end_tag());
  return m_tag.attributes;
  }
 
 private:
- struct Position {
- size_t line { 0 };
- size_t column { 0 };
- };
-
- struct AttributeBuilder {
- String prefix;
- String local_name;
- String namespace_;
- String value;
- Position name_start_position;
- Position value_start_position;
- Position name_end_position;
- Position value_end_position;
- };
-
  Type m_type { Type::Invalid };
 
  // Type::DOCTYPE