Make accessors for oddball objects return Oddball* instead of Object*.

src/objects.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5198 matching lines @@
   // Casting.
   static inline GlobalObject* cast(Object* obj);
 
   // Layout description.
   static const int kBuiltinsOffset = JSObject::kHeaderSize;
   static const int kGlobalContextOffset = kBuiltinsOffset + kPointerSize;
   static const int kGlobalReceiverOffset = kGlobalContextOffset + kPointerSize;
   static const int kHeaderSize = kGlobalReceiverOffset + kPointerSize;
 
  private:
-  friend class AGCCVersionRequiresThisClassToHaveAFriendSoHereItIs;
-
   DISALLOW_IMPLICIT_CONSTRUCTORS(GlobalObject);
 };
 
 
 // JavaScript global object.
 class JSGlobalObject: public GlobalObject {
  public:
   // Casting.
   static inline JSGlobalObject* cast(Object* obj);
 
@@ skipping 1968 matching lines @@
   DECL_ACCESSORS(property_list, Object)
 
 #ifdef DEBUG
   void TemplateInfoVerify();
 #endif
 
   static const int kTagOffset          = HeapObject::kHeaderSize;
   static const int kPropertyListOffset = kTagOffset + kPointerSize;
   static const int kHeaderSize         = kPropertyListOffset + kPointerSize;
  protected:
-  friend class AGCCVersionRequiresThisClassToHaveAFriendSoHereItIs;
   DISALLOW_IMPLICIT_CONSTRUCTORS(TemplateInfo);
 };
 
 
 class FunctionTemplateInfo: public TemplateInfo {
  public:
   DECL_ACCESSORS(serial_number, Object)
   DECL_ACCESSORS(call_code, Object)
   DECL_ACCESSORS(property_accessors, Object)
   DECL_ACCESSORS(prototype_template, Object)
@@ skipping 350 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_