Make Map::Create always use the Object function, and remove the unused inobject properties

src/objects.h

 // Copyright 2012 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 "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/base/bits.h"
@@ skipping 6361 matching lines @@
       Handle<Map> map, Handle<Name> name, AccessorComponent component,
       Handle<Object> accessor, PropertyAttributes attributes);
   static Handle<Map> ReconfigureDataProperty(Handle<Map> map, int descriptor,
                                              PropertyAttributes attributes);
 
   inline void AppendDescriptor(Descriptor* desc);
 
   // Returns a copy of the map, with all transitions dropped from the
   // instance descriptors.
   static Handle<Map> Copy(Handle<Map> map);
-  static Handle<Map> Create(Handle<JSFunction> constructor,
-                            int extra_inobject_properties);
+  static Handle<Map> Create(Isolate* isolate, int inobject_properties);
 
   // Returns the next free property index (only valid for FAST MODE).
   int NextFreePropertyIndex();
 
   // Returns the number of properties described in instance_descriptors
   // filtering out properties with the specified attributes.
   int NumberOfDescribedProperties(DescriptorFlag which = OWN_DESCRIPTORS,
                                   PropertyAttributes filter = NONE);
 
   // Returns the number of slots allocated for the initial properties
@@ skipping 4741 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_