AK+LibWeb: Do not percent encode/decode in URL fragment setter/getters

The web specs do not expect decoding or decoding to happen when calling
these helpers. This allows us to remove the raw_fragment helper function
from the URL class.

AK/URL.cpp

@@ -63,11 +63,6 @@ DeprecatedString URL::basename() const
 }
 
 DeprecatedString URL::fragment() const
-{
-    return percent_decode(m_fragment);
-}
-
-DeprecatedString URL::raw_fragment() const
 {
     return m_fragment;
 }
@@ -142,7 +137,7 @@ void URL::append_path(StringView path)
 
 void URL::set_fragment(StringView fragment)
 {
-    m_fragment = deprecated_string_percent_encode(fragment, PercentEncodeSet::Fragment);
+    m_fragment = fragment;
 }
 
 // https://url.spec.whatwg.org/#cannot-have-a-username-password-port

AK/URL.h

@@ -83,9 +83,7 @@ public:
     ErrorOr<String> serialized_host() const;
     DeprecatedString basename() const;
     Optional<String> const& query() const { return m_query; }
-    // NOTE: fragment() is percent-decoded, raw_fragment() is not.
     DeprecatedString fragment() const;
-    DeprecatedString raw_fragment() const;
     Optional<u16> port() const { return m_port; }
     DeprecatedString path_segment_at_index(size_t index) const;
     size_t path_segment_count() const { return m_paths.size(); }

Userland/Libraries/LibWeb/DOM/Document.cpp

@@ -1737,7 +1737,7 @@ Document::IndicatedPart Document::determine_the_indicated_part() const
     // For an HTML document document, the following processing model must be followed to determine its indicated part:
 
     // 1. Let fragment be document's URL's fragment.
-    auto fragment = url().raw_fragment();
+    auto fragment = url().fragment();
 
     // 2. If fragment is the empty string, then return the special value top of the document.
     if (fragment.is_empty())
@@ -1752,8 +1752,7 @@ Document::IndicatedPart Document::determine_the_indicated_part() const
 
     // 5. Let fragmentBytes be the result of percent-decoding fragment.
     // 6. Let decodedFragment be the result of running UTF-8 decode without BOM on fragmentBytes.
-    // NOTE: 5 and 6 are done as a single step in `AK::URL::fragment()`.
-    auto decoded_fragment = url().fragment();
+    auto decoded_fragment = AK::URL::percent_decode(fragment);
 
     // 7. Set potentialIndicatedElement to the result of finding a potential indicated element given document and decodedFragment.
     potential_indicated_element = find_a_potential_indicated_element(decoded_fragment);