Fix issue 186:...

src/objects-inl.h

 // Copyright 2006-2008 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 310 matching lines @@
   return this == Failure::Exception();
 }
 
 
 bool Object::IsJSObject() {
   return IsHeapObject()
     && HeapObject::cast(this)->map()->instance_type() >= FIRST_JS_OBJECT_TYPE;
 }
 
 
+bool Object::IsJSContextExtensionObject() {
+  return IsHeapObject()
+    && (HeapObject::cast(this)->map()->instance_type() ==
+        JS_CONTEXT_EXTENSION_OBJECT_TYPE);
+}
+
+
 bool Object::IsMap() {
   return Object::IsHeapObject()
     && HeapObject::cast(this)->map()->instance_type() == MAP_TYPE;
 }
 
 
 bool Object::IsFixedArray() {
   return Object::IsHeapObject()
     && HeapObject::cast(this)->map()->instance_type() == FIXED_ARRAY_TYPE;
 }
@@ skipping 670 matching lines @@
       return JSBuiltinsObject::kSize;
     case JS_FUNCTION_TYPE:
       return JSFunction::kSize;
     case JS_VALUE_TYPE:
       return JSValue::kSize;
     case JS_ARRAY_TYPE:
       return JSValue::kSize;
     case JS_REGEXP_TYPE:
       return JSValue::kSize;
     case JS_OBJECT_TYPE:
+    case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
       return JSObject::kHeaderSize;
     default:
       UNREACHABLE();
       return 0;
   }
 }
 
 
 int JSObject::GetInternalFieldCount() {
   ASSERT(1 << kPointerSizeLog2 == kPointerSize);
@@ skipping 1455 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_