Revert of Implement subclassing Arrays.

src/runtime/runtime-array.cc

Index: src/runtime/runtime-array.cc
diff --git a/src/runtime/runtime-array.cc b/src/runtime/runtime-array.cc
index 988e158950356e0817b2728904242febba79a564..6d8a11e2407530ab9b52a5371d8218c3088e65a8 100644
--- a/src/runtime/runtime-array.cc
+++ b/src/runtime/runtime-array.cc
@@ -1038,7 +1038,6 @@
 
 static Object* ArrayConstructorCommon(Isolate* isolate,
                                       Handle<JSFunction> constructor,
-                                      Handle<JSFunction> original_constructor,
                                       Handle<AllocationSite> site,
                                       Arguments* caller_args) {
   Factory* factory = isolate->factory();
@@ -1110,19 +1109,6 @@
     // We must mark the allocationsite as un-inlinable.
     site->SetDoNotInlineCall();
   }
-
-  // Set up the prototoype using original function.
-  // TODO(dslomov): instead of setting the __proto__,
-  // use and cache the correct map.
-  if (*original_constructor != *constructor) {
-    if (original_constructor->has_instance_prototype()) {
-      Handle<Object> prototype =
-          handle(original_constructor->instance_prototype(), isolate);
-      RETURN_FAILURE_ON_EXCEPTION(
-          isolate, JSObject::SetPrototype(array, prototype, false));
-    }
-  }
-
   return *array;
 }
 
@@ -1156,23 +1142,7 @@
     DCHECK(!site->SitePointsToLiteral());
   }
 
-  return ArrayConstructorCommon(isolate, constructor, constructor, site,
-                                caller_args);
-}
-
-
-RUNTIME_FUNCTION(Runtime_ArrayConstructorWithSubclassing) {
-  HandleScope scope(isolate);
-  DCHECK(args.length() >= 2);
-  int args_length = args.length();
-  CHECK(args[args_length - 2]->IsJSFunction());
-  CHECK(args[args_length - 1]->IsJSFunction());
-  Handle<JSFunction> constructor(JSFunction::cast(args[args_length - 2]));
-  Handle<JSFunction> original_constructor(
-      JSFunction::cast(args[args_length - 1]));
-  Arguments caller_args(args_length - 2, args.arguments());
-  return ArrayConstructorCommon(isolate, constructor, original_constructor,
-                                Handle<AllocationSite>::null(), &caller_args);
+  return ArrayConstructorCommon(isolate, constructor, site, caller_args);
 }
 
 
@@ -1191,7 +1161,7 @@
     DCHECK(arg_count == caller_args->length());
   }
 #endif
-  return ArrayConstructorCommon(isolate, constructor, constructor,
+  return ArrayConstructorCommon(isolate, constructor,
                                 Handle<AllocationSite>::null(), caller_args);
 }