correctly invalidate global cells

src/hydrogen.h

 // Copyright 2012 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_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 2606 matching lines @@
       Map* target =
           TransitionArray::SearchTransition(map, kData, name, attributes);
       if (target == NULL) return NotFound();
       lookup_type_ = TRANSITION_TYPE;
       transition_ = handle(target);
       number_ = transition_->LastAdded();
       details_ = transition_->instance_descriptors()->GetDetails(number_);
     }
     void NotFound() {
       lookup_type_ = NOT_FOUND;
-      details_ = PropertyDetails(NONE, DATA, 0);
+      details_ = PropertyDetails::Empty();
     }
     Representation representation() const {
       DCHECK(IsFound());
       return details_.representation();
     }
     bool IsTransitionToData() const {
       return IsTransition() && details_.type() == DATA;
     }
 
     Zone* zone() { return builder_->zone(); }
@@ skipping 388 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_