Refactoring only: Make the handling of PropertyType more explicit.

src/objects-inl.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 1847 matching lines @@
   return reinterpret_cast<AccessorDescriptor*>(p->foreign_address());
 }
 
 
 bool DescriptorArray::IsProperty(int descriptor_number) {
   return GetType(descriptor_number) < FIRST_PHANTOM_PROPERTY_TYPE;
 }
 
 
 bool DescriptorArray::IsTransition(int descriptor_number) {
-  PropertyType t = GetType(descriptor_number);
-  return t == MAP_TRANSITION || t == CONSTANT_TRANSITION ||
-      t == ELEMENTS_TRANSITION;
+  return IsTransitionType(GetType(descriptor_number));
 }
 
 
 bool DescriptorArray::IsNullDescriptor(int descriptor_number) {
   return GetType(descriptor_number) == NULL_DESCRIPTOR;
 }
 
 
 bool DescriptorArray::IsDontEnum(int descriptor_number) {
   return PropertyDetails(GetDetails(descriptor_number)).IsDontEnum();
@@ skipping 2726 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_