Adding ArrayBuffer support to ServiceWorker Response and tests

Source/modules/serviceworkers/Response.idl

Index: Source/modules/serviceworkers/Response.idl
diff --git a/Source/modules/serviceworkers/Response.idl b/Source/modules/serviceworkers/Response.idl
index 00fd8c05cda8bdb3b3667a74674ebd0593a7cced..f78e9fd35e92f61b4941edc6fa2937ca8b8ffc79 100644
--- a/Source/modules/serviceworkers/Response.idl
+++ b/Source/modules/serviceworkers/Response.idl
@@ -7,10 +7,11 @@
 enum ResponseType { "basic", "cors", "default", "error", "opaque" };
 
 [
-    // FIXME: Add ctors for ArrayBuffer, ArrayBufferView, FormData,
-    // and URLSearchParams response bodies.
+    // FIXME: Add ctors for ArrayBufferView, FormData and URLSearchParams
+    // response bodies.
     Constructor(ScalarValueString body, optional Dictionary responseInitDict),
     Constructor(Blob? body, optional Dictionary responseInitDict),
+    Constructor(ArrayBuffer input, optional Dictionary requestInitDict),
     RuntimeEnabled=ServiceWorker,
     Exposed=ServiceWorker,
     RaisesException=Constructor,