LibWeb+LibURL: Get blob's environments origin from URL's blob entry

This closer matches specification - and removes any dependency on
LibWeb in the implementation of DOMURL::url_origin.

It is also one step closer to moving BlobURLRegistry to a singleton
process to match LibWeb's multiprocess Worker architecture.

Userland/Libraries/LibIPC/Decoder.cpp

@@ -91,6 +91,7 @@ ErrorOr<URL::URL> decode(Decoder& decoder)
     url.set_blob_url_entry(URL::BlobURLEntry {
         .type = TRY(decoder.decode<String>()),
         .byte_buffer = TRY(decoder.decode<ByteBuffer>()),
+        .environment_origin = TRY(decoder.decode<URL::Origin>()),
     });
 
     return url;

Userland/Libraries/LibIPC/Encoder.cpp

@@ -111,6 +111,7 @@ ErrorOr<void> encode(Encoder& encoder, URL::URL const& value)
 
     TRY(encoder.encode(blob.type));
     TRY(encoder.encode(blob.byte_buffer));
+    TRY(encoder.encode(blob.environment_origin));
 
     return {};
 }

Userland/Libraries/LibURL/URL.h

@@ -14,6 +14,7 @@
 #include <AK/StringView.h>
 #include <AK/Vector.h>
 #include <LibURL/Host.h>
+#include <LibURL/Origin.h>
 
 // On Linux distros that use mlibc `basename` is defined as a macro that expands to `__mlibc_gnu_basename` or `__mlibc_gnu_basename_c`, so we undefine it.
 #if defined(AK_OS_LINUX) && defined(basename)
@@ -44,6 +45,7 @@ enum class ExcludeFragment {
 struct BlobURLEntry {
     String type;
     ByteBuffer byte_buffer;
+    Origin environment_origin;
 };
 
 void append_percent_encoded_if_necessary(StringBuilder&, u32 code_point, PercentEncodeSet set = PercentEncodeSet::Userinfo);

Userland/Libraries/LibWeb/DOMURL/DOMURL.cpp

@@ -489,8 +489,8 @@ URL::Origin url_origin(URL::URL const& url)
         auto url_string = url.to_string().release_value_but_fixme_should_propagate_errors();
 
         // 1. If url’s blob URL entry is non-null, then return url’s blob URL entry’s environment’s origin.
-        if (auto blob_url_entry = FileAPI::blob_url_store().get(url_string); blob_url_entry.has_value())
-            return blob_url_entry->environment->origin();
+        if (url.blob_url_entry().has_value())
+            return url.blob_url_entry()->environment_origin;
 
         // 2. Let pathURL be the result of parsing the result of URL path serializing url.
         auto path_url = parse(url.serialize_path());
@@ -582,6 +582,7 @@ URL::URL parse(StringView input, Optional<URL::URL> const& base_url, Optional<St
         url.set_blob_url_entry(URL::BlobURLEntry {
             .type = blob_url_entry->object->type(),
             .byte_buffer = MUST(ByteBuffer::copy(blob_url_entry->object->raw_bytes())),
+            .environment_origin = blob_url_entry->environment->origin(),
         });
     }