Add Smi::Zero and replace all Smi::FromInt(0) calls

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 <iosfwd>
 
 #include "src/factory.h"
@@ skipping 14 matching lines @@
   PropertyDetails GetDetails() const { return details_; }
 
   void SetSortedKeyIndex(int index) { details_ = details_.set_pointer(index); }
 
  private:
   Handle<Name> key_;
   Handle<Object> value_;
   PropertyDetails details_;
 
  protected:
-  Descriptor() : details_(Smi::FromInt(0)) {}
+  Descriptor() : details_(Smi::kZero) {}
 
   void Init(Handle<Name> key, Handle<Object> value, PropertyDetails details) {
     DCHECK(key->IsUniqueName());
     key_ = key;
     value_ = value;
     details_ = details;
   }
 
   Descriptor(Handle<Name> key, Handle<Object> value, PropertyDetails details)
       : key_(key), value_(value), details_(details) {
@@ skipping 47 matching lines @@
                              PropertyAttributes attributes)
       : Descriptor(key, foreign, attributes, ACCESSOR_CONSTANT,
                    Representation::Tagged()) {}
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PROPERTY_H_