Mark single-argument inline constructors as 'explicit'.

src/property.h

 // Copyright 2006-2008 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 167 matching lines @@
         cacheable_(true),
         details_(NONE, NORMAL) {}
 
   void DescriptorResult(JSObject* holder, PropertyDetails details, int number) {
     lookup_type_ = DESCRIPTOR_TYPE;
     holder_ = holder;
     details_ = details;
     number_ = number;
   }
 
+  void DescriptorResult(JSObject* holder, Smi* details, int number) {
+    lookup_type_ = DESCRIPTOR_TYPE;
+    holder_ = holder;
+    details_ = PropertyDetails(details);
+    number_ = number;
+  }
+
   void ConstantResult(JSObject* holder) {
     lookup_type_ = CONSTANT_TYPE;
     holder_ = holder;
     details_ =
         PropertyDetails(static_cast<PropertyAttributes>(DONT_ENUM |
                                                         DONT_DELETE),
                         CALLBACKS);
     number_ = -1;
   }
 
@@ skipping 141 matching lines @@
   JSObject* holder_;
   int number_;
   bool cacheable_;
   PropertyDetails details_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_H_