Change JavaScriptMetadata to contain list of receivers

Bug: 1255619, 1327573
Change-Id: I8fbe5a041b1ef5aef519d1b0b76f1bded237bd6f
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3580497
Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Johan Bay <jobay@chromium.org>
diff --git a/scripts/javascript_natives/tests.js b/scripts/javascript_natives/tests.js
index 84e3499..97f0bc7 100644
--- a/scripts/javascript_natives/tests.js
+++ b/scripts/javascript_natives/tests.js
@@ -182,12 +182,12 @@
   {
     name: "diffSig",
     signatures: [["oneSig"]],
-    receiver: "Array"
+    receivers: ["Array"]
   },
   {
     name: "diffSig",
     signatures: [["twoSig"]],
-    receiver: "ReadonlyArray"
+    receivers: ["ReadonlyArray"]
   }
 ];`;
     assert.equal(output, expected);