Changed the global object representation

src/objects-inl.h

Index: src/objects-inl.h
===================================================================
--- src/objects-inl.h	(revision 2285)
+++ src/objects-inl.h	(working copy)
@@ -53,6 +53,13 @@
 }
 
 
+PropertyDetails PropertyDetails::AsDeleted() {
+  PropertyDetails d(DONT_ENUM, NORMAL);
+  Smi* smi = Smi::FromInt(AsSmi()->value() | DeletedField::encode(1));
+  return PropertyDetails(smi);
+}
+
+
 #define CAST_ACCESSOR(type)                     \
   type* type::cast(Object* object) {            \
     ASSERT(object->Is##type());                 \
@@ -409,6 +416,13 @@
 }
 
 
+bool Object::IsJSGlobalPropertyCell() {
+  return Object::IsHeapObject()
+      && HeapObject::cast(this)->map()->instance_type()
+      == JS_GLOBAL_PROPERTY_CELL_TYPE;
+}
+
+
 bool Object::IsSharedFunctionInfo() {
   return Object::IsHeapObject() &&
       (HeapObject::cast(this)->map()->instance_type() ==
@@ -1040,6 +1054,8 @@
 ACCESSORS(Oddball, to_number, Object, kToNumberOffset)
 
 
+ACCESSORS(JSGlobalPropertyCell, value, Object, kValueOffset)
+
 int JSObject::GetHeaderSize() {
   switch (map()->instance_type()) {
     case JS_GLOBAL_PROXY_TYPE:
@@ -1397,6 +1413,7 @@
 CAST_ACCESSOR(HeapObject)
 CAST_ACCESSOR(HeapNumber)
 CAST_ACCESSOR(Oddball)
+CAST_ACCESSOR(JSGlobalPropertyCell)
 CAST_ACCESSOR(SharedFunctionInfo)
 CAST_ACCESSOR(Map)
 CAST_ACCESSOR(JSFunction)