Move runtime helper for JSWeakCollection onto objects.

src/runtime/runtime.h

Index: src/runtime/runtime.h
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index f0a3d452d92f13a2199d83693b046fed626da148..afd09473ffb67488851983304332abc01c0a59ac 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -1168,7 +1168,7 @@ class Runtime : public AllStatic {
       SharedFlag shared = SharedFlag::kNotShared);
 
   enum TypedArrayId {
-    // arrayIds below should be synchromized with typedarray.js natives.
+    // arrayIds below should be synchronized with typedarray.js natives.
     ARRAY_ID_UINT8 = 1,
     ARRAY_ID_INT8 = 2,
     ARRAY_ID_UINT16 = 3,
@@ -1191,16 +1191,6 @@ class Runtime : public AllStatic {
       Isolate* isolate, Handle<FixedArray> literals,
       Handle<FixedArray> elements, bool is_strong);
 
-  static void WeakCollectionInitialize(
-      Isolate* isolate, Handle<JSWeakCollection> weak_collection);
-  static void WeakCollectionSet(Handle<JSWeakCollection> weak_collection,
-                                Handle<Object> key, Handle<Object> value,
-                                int32_t hash);
-  static bool WeakCollectionDelete(Handle<JSWeakCollection> weak_collection,
-                                   Handle<Object> key);
-  static bool WeakCollectionDelete(Handle<JSWeakCollection> weak_collection,
-                                   Handle<Object> key, int32_t hash);
-
   static MaybeHandle<JSArray> GetInternalProperties(Isolate* isolate,
                                                     Handle<Object>);