Remove the descriptor stream abstractions....

src/objects.h

 // Copyright 2006-2009 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 1832 matching lines @@
   Object* GetEnumCache() {
     ASSERT(HasEnumCache());
     FixedArray* bridge = FixedArray::cast(get(kEnumerationIndexIndex));
     return bridge->get(kEnumCacheBridgeCacheIndex);
   }
 
   // Initialize or change the enum cache,
   // using the supplied storage for the small "bridge".
   void SetEnumCache(FixedArray* bridge_storage, FixedArray* new_cache);
 
-  // Accessors for fetching instance descriptor at descriptor number..
+  // Accessors for fetching instance descriptor at descriptor number.
   inline String* GetKey(int descriptor_number);
   inline Object* GetValue(int descriptor_number);
   inline Smi* GetDetails(int descriptor_number);
+  inline PropertyType GetType(int descriptor_number);
+  inline int GetFieldIndex(int descriptor_number);
+  inline JSFunction* GetConstantFunction(int descriptor_number);
+  inline Object* GetCallbacksObject(int descriptor_number);
+  inline AccessorDescriptor* GetCallbacks(int descriptor_number);
+  inline bool IsProperty(int descriptor_number);
+  inline bool IsTransition(int descriptor_number);
+  inline bool IsNullDescriptor(int descriptor_number);
+  inline bool IsDontEnum(int descriptor_number);
 
   // Accessor for complete descriptor.
   inline void Get(int descriptor_number, Descriptor* desc);
   inline void Set(int descriptor_number, Descriptor* desc);
 
+  // Transfer complete descriptor from another descriptor array to
+  // this one.
+  inline void SetFrom(int index, DescriptorArray* src, int src_index);
+
   // Copy the descriptor array, insert a new descriptor and optionally
   // remove map transitions.  If the descriptor is already present, it is
   // replaced.  If a replaced descriptor is a real property (not a transition
   // or null), its enumeration index is kept as is.
   // If adding a real property, map transitions must be removed.  If adding
   // a transition, they must not be removed.  All null descriptors are removed.
   Object* CopyInsert(Descriptor* descriptor, TransitionFlag transition_flag);
 
   // Remove all transitions.  Return  a copy of the array with all transitions
   // removed, or a Failure object if the new array could not be allocated.
@@ skipping 2851 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_