Move SetObjectPrototype to JSObject

src/objects.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 2290 matching lines @@
                                               ElementsKind to_kind);
   static void TransitionElementsKind(Handle<JSObject> object,
                                      ElementsKind to_kind);
 
   // Always use this to migrate an object to a new map.
   // |expected_additional_properties| is only used for fast-to-slow transitions
   // and ignored otherwise.
   static void MigrateToMap(Handle<JSObject> object, Handle<Map> new_map,
                            int expected_additional_properties = 0);
 
+  // Forces a prototype without any of the checks that the regular SetPrototype
+  // would do.
+  static void ForceSetPrototype(Handle<JSObject> object, Handle<Object> proto);
+
   // Convert the object to use the canonical dictionary
   // representation. If the object is expected to have additional properties
   // added this number can be indicated to have the backing store allocated to
   // an initial capacity for holding these properties.
   static void NormalizeProperties(Handle<JSObject> object,
                                   PropertyNormalizationMode mode,
                                   int expected_additional_properties,
                                   const char* reason);
 
   // Convert and update the elements backing store to be a
@@ skipping 8672 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_