Rename IsDontDelete to IsConfigurable (and invert conditions)

src/property.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PROPERTY_H_
 #define V8_PROPERTY_H_
 
 #include "src/factory.h"
 #include "src/field-index.h"
 #include "src/field-index-inl.h"
@@ skipping 242 matching lines @@
 
   bool IsNormal() const {
     return IsFound() && IsDescriptorOrDictionary() && type() == NORMAL;
   }
 
   bool IsConstant() const {
     DCHECK(!(details_.type() == CONSTANT && !IsFound()));
     return IsDescriptorOrDictionary() && type() == CONSTANT;
   }
 
-  bool IsDontDelete() const { return details_.IsDontDelete(); }
+  bool IsConfigurable() const { return details_.IsConfigurable(); }
   bool IsDontEnum() const { return details_.IsDontEnum(); }
   bool IsFound() const { return lookup_type_ != NOT_FOUND; }
   bool IsDescriptorOrDictionary() const {
     return lookup_type_ == DESCRIPTOR_TYPE || lookup_type_ == DICTIONARY_TYPE;
   }
   bool IsTransition() const { return lookup_type_ == TRANSITION_TYPE; }
   bool IsHandler() const { return lookup_type_ == HANDLER_TYPE; }
   bool IsInterceptor() const { return lookup_type_ == INTERCEPTOR_TYPE; }
 
   // Is the result is a property excluding transitions and the null descriptor?
@@ skipping 110 matching lines @@
   int number_;
   bool cacheable_;
   PropertyDetails details_;
 };
 
 
 OStream& operator<<(OStream& os, const LookupResult& r);
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_H_