From c0a324468765cb49c87e3ea4175b7070c3dff5e0 Mon Sep 17 00:00:00 2001
From: Boris Zbarsky <bzbarsky@mit.edu>
Date: Wed, 18 Nov 2015 18:26:07 -0500
Subject: [PATCH] Bug 1225392 part 1.  Expose JSAPI for getting
 %IteratorPrototype%.  r=efaust

---
 js/src/jsapi.cpp | 8 ++++++++
 js/src/jsapi.h   | 7 +++++++
 2 files changed, 15 insertions(+)

diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp
index 6799334eafcf..25e8257d3a7b 100644
--- a/js/src/jsapi.cpp
+++ b/js/src/jsapi.cpp
@@ -1220,6 +1220,14 @@ JS_GetErrorPrototype(JSContext* cx)
     return GlobalObject::getOrCreateCustomErrorPrototype(cx, global, JSEXN_ERR);
 }
 
+JS_PUBLIC_API(JSObject*)
+JS_GetIteratorPrototype(JSContext* cx)
+{
+    CHECK_REQUEST(cx);
+    Rooted<GlobalObject*> global(cx, cx->global());
+    return GlobalObject::getOrCreateIteratorPrototype(cx, global);
+}
+
 JS_PUBLIC_API(JSObject*)
 JS_GetGlobalForObject(JSContext* cx, JSObject* obj)
 {
diff --git a/js/src/jsapi.h b/js/src/jsapi.h
index 113926771563..2fa1b9f370c1 100644
--- a/js/src/jsapi.h
+++ b/js/src/jsapi.h
@@ -1503,6 +1503,13 @@ JS_GetArrayPrototype(JSContext* cx, JS::HandleObject forObj);
 extern JS_PUBLIC_API(JSObject*)
 JS_GetErrorPrototype(JSContext* cx);
 
+/**
+ * Returns the %IteratorPrototype% object that all built-in iterator prototype
+ * chains go through for the global object of the current compartment of cx.
+ */
+extern JS_PUBLIC_API(JSObject*)
+JS_GetIteratorPrototype(JSContext* cx);
+
 extern JS_PUBLIC_API(JSObject*)
 JS_GetGlobalForObject(JSContext* cx, JSObject* obj);