Implement ReadableStream as a V8 extra

Source/core/streams/StreamTest.h

Index: Source/core/streams/StreamTest.h
diff --git a/Source/core/streams/StreamTest.h b/Source/core/streams/StreamTest.h
new file mode 100644
index 0000000000000000000000000000000000000000..2fcb359daf5a3bfee8b0ba1050ab8f63e8b95c26
--- /dev/null
+++ b/Source/core/streams/StreamTest.h
@@ -0,0 +1,21 @@
+#ifndef StreamTest_h
+#define StreamTest_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "bindings/core/v8/ScriptState.h"
+#include "core/streams/ScriptReadableStream.h"
+
+namespace blink {
+
+class CORE_EXPORT StreamTest : public GarbageCollectedFinalized<StreamTest>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+
+public:
+    static ScriptReadableStream test(ScriptState*);
+
+    DECLARE_VIRTUAL_TRACE();
+};
+
+} // namespace blink
+
+#endif StreamTest_h