LibWeb: Return GC::Ref for some Stream promise returning functions

These will never return null.

Libraries/LibWeb/Streams/WritableStream.cpp

@@ -58,7 +58,7 @@ bool WritableStream::locked() const
 }
 
 // https://streams.spec.whatwg.org/#ws-close
-GC::Ptr<WebIDL::Promise> WritableStream::close()
+GC::Ref<WebIDL::Promise> WritableStream::close()
 {
     auto& realm = this->realm();
 
@@ -79,7 +79,7 @@ GC::Ptr<WebIDL::Promise> WritableStream::close()
 }
 
 // https://streams.spec.whatwg.org/#ws-abort
-GC::Ptr<WebIDL::Promise> WritableStream::abort(JS::Value reason)
+GC::Ref<WebIDL::Promise> WritableStream::abort(JS::Value reason)
 {
     auto& realm = this->realm();
 

Libraries/LibWeb/Streams/WritableStream.h

@@ -49,8 +49,8 @@ public:
     virtual ~WritableStream() = default;
 
     bool locked() const;
-    GC::Ptr<WebIDL::Promise> abort(JS::Value reason);
-    GC::Ptr<WebIDL::Promise> close();
+    GC::Ref<WebIDL::Promise> abort(JS::Value reason);
+    GC::Ref<WebIDL::Promise> close();
     WebIDL::ExceptionOr<GC::Ref<WritableStreamDefaultWriter>> get_writer();
 
     bool backpressure() const { return m_backpressure; }

Libraries/LibWeb/Streams/WritableStreamDefaultWriter.cpp

@@ -52,7 +52,7 @@ GC::Ptr<WebIDL::Promise> WritableStreamDefaultWriter::ready()
 }
 
 // https://streams.spec.whatwg.org/#default-writer-abort
-GC::Ptr<WebIDL::Promise> WritableStreamDefaultWriter::abort(JS::Value reason)
+GC::Ref<WebIDL::Promise> WritableStreamDefaultWriter::abort(JS::Value reason)
 {
     auto& realm = this->realm();
 
@@ -67,7 +67,7 @@ GC::Ptr<WebIDL::Promise> WritableStreamDefaultWriter::abort(JS::Value reason)
 }
 
 // https://streams.spec.whatwg.org/#default-writer-close
-GC::Ptr<WebIDL::Promise> WritableStreamDefaultWriter::close()
+GC::Ref<WebIDL::Promise> WritableStreamDefaultWriter::close()
 {
     auto& realm = this->realm();
 
@@ -106,7 +106,7 @@ void WritableStreamDefaultWriter::release_lock()
 }
 
 // https://streams.spec.whatwg.org/#default-writer-write
-GC::Ptr<WebIDL::Promise> WritableStreamDefaultWriter::write(JS::Value chunk)
+GC::Ref<WebIDL::Promise> WritableStreamDefaultWriter::write(JS::Value chunk)
 {
     auto& realm = this->realm();
 

Libraries/LibWeb/Streams/WritableStreamDefaultWriter.h

@@ -28,10 +28,10 @@ public:
     GC::Ptr<WebIDL::Promise> closed();
     WebIDL::ExceptionOr<Optional<double>> desired_size() const;
     GC::Ptr<WebIDL::Promise> ready();
-    GC::Ptr<WebIDL::Promise> abort(JS::Value reason);
-    GC::Ptr<WebIDL::Promise> close();
+    GC::Ref<WebIDL::Promise> abort(JS::Value reason);
+    GC::Ref<WebIDL::Promise> close();
     void release_lock();
-    GC::Ptr<WebIDL::Promise> write(JS::Value chunk);
+    GC::Ref<WebIDL::Promise> write(JS::Value chunk);
 
     GC::Ptr<WebIDL::Promise> closed_promise() { return m_closed_promise; }
     void set_closed_promise(GC::Ptr<WebIDL::Promise> value) { m_closed_promise = value; }