Get rid of the TRANSITION PropertyType and consistently use CanHoldValue().

src/property-details.h

 // Copyright 2012 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 59 matching lines @@
 enum PropertyType {
   // Only in slow mode.
   NORMAL                    = 0,
   // Only in fast mode.
   FIELD                     = 1,
   CONSTANT                  = 2,
   CALLBACKS                 = 3,
   // Only in lookup results, not in descriptors.
   HANDLER                   = 4,
   INTERCEPTOR               = 5,
-  TRANSITION                = 6,
   // Only used as a marker in LookupResult.
-  NONEXISTENT               = 7
+  NONEXISTENT               = 6
 };
 
 
 class Representation {
  public:
   enum Kind {
     kNone,
     kInteger8,
     kUInteger8,
     kInteger16,
@@ skipping 229 matching lines @@
   PropertyDetails(int value, PropertyAttributes attributes) {
     value_ = AttributesField::update(value, attributes);
   }
 
   uint32_t value_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_DETAILS_H_