LibWeb: Port SubtleCrypto to new String

The algorithm comparison in digest() is done using a StringView to avoid
complex error handling and promise rejection.

Userland/Libraries/LibWeb/Crypto/SubtleCrypto.cpp

@@ -35,7 +35,7 @@ JS::ThrowCompletionOr<void> SubtleCrypto::initialize(JS::Realm& realm)
 }
 
 // https://w3c.github.io/webcrypto/#dfn-SubtleCrypto-method-digest
-JS::Promise* SubtleCrypto::digest(DeprecatedString const& algorithm, JS::Handle<JS::Object> const& data)
+JS::Promise* SubtleCrypto::digest(String const& algorithm, JS::Handle<JS::Object> const& data)
 {
     auto& realm = this->realm();
 
@@ -54,13 +54,14 @@ JS::Promise* SubtleCrypto::digest(DeprecatedString const& algorithm, JS::Handle<
     // 3. Let normalizedAlgorithm be the result of normalizing an algorithm, with alg set to algorithm and op set to "digest".
     // FIXME: This is way more generic than it needs to be right now, so we simplify it.
     ::Crypto::Hash::HashKind hash_kind;
-    if (algorithm.equals_ignoring_case("SHA-1"sv)) {
+    auto algorithm_as_string_view = algorithm.bytes_as_string_view();
+    if (algorithm_as_string_view.equals_ignoring_case("SHA-1"sv)) {
         hash_kind = ::Crypto::Hash::HashKind::SHA1;
-    } else if (algorithm.equals_ignoring_case("SHA-256"sv)) {
+    } else if (algorithm_as_string_view.equals_ignoring_case("SHA-256"sv)) {
         hash_kind = ::Crypto::Hash::HashKind::SHA256;
-    } else if (algorithm.equals_ignoring_case("SHA-384"sv)) {
+    } else if (algorithm_as_string_view.equals_ignoring_case("SHA-384"sv)) {
         hash_kind = ::Crypto::Hash::HashKind::SHA384;
-    } else if (algorithm.equals_ignoring_case("SHA-512"sv)) {
+    } else if (algorithm_as_string_view.equals_ignoring_case("SHA-512"sv)) {
         hash_kind = ::Crypto::Hash::HashKind::SHA512;
     }
     // 4. If an error occurred, return a Promise rejected with normalizedAlgorithm.

Userland/Libraries/LibWeb/Crypto/SubtleCrypto.h

@@ -19,7 +19,7 @@ public:
 
     virtual ~SubtleCrypto() override;
 
-    JS::Promise* digest(DeprecatedString const& algorithm, JS::Handle<JS::Object> const& data);
+    JS::Promise* digest(String const& algorithm, JS::Handle<JS::Object> const& data);
 
 private:
     explicit SubtleCrypto(JS::Realm&);

Userland/Libraries/LibWeb/Crypto/SubtleCrypto.idl

@@ -1,4 +1,4 @@
-[SecureContext,Exposed=(Window,Worker)]
+[SecureContext,Exposed=(Window,Worker), UseNewAKString]
 interface SubtleCrypto {
     // FIXME: Add support for AlgorithmIdentifier ("typedef (object or DOMString)")
     Promise<any> digest(DOMString algorithm, BufferSource data);