Reimplement SetProperty using the LookupIterator

src/lookup.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_LOOKUP_H_
 #define V8_LOOKUP_H_
 
 #include "src/factory.h"
 #include "src/isolate.h"
 #include "src/objects.h"
@@ skipping 74 matching lines @@
   Handle<Name> name() const { return name_; }
 
   bool IsFound() const { return state_ != NOT_FOUND; }
   void Next();
 
   Heap* heap() const { return isolate_->heap(); }
   Factory* factory() const { return isolate_->factory(); }
   Handle<Object> GetReceiver() const {
     return Handle<Object>::cast(maybe_receiver_.ToHandleChecked());
   }
+  Handle<Map> holder_map() const { return holder_map_; }
   Handle<JSObject> GetHolder() const {
     ASSERT(IsFound() && state_ != JSPROXY);
     return Handle<JSObject>::cast(maybe_holder_.ToHandleChecked());
   }
   Handle<JSReceiver> GetRoot() const;
+  bool HolderIsReceiver() const;
 
   /* Dynamically reduce the trapped types. */
   void skip_interceptor() {
     configuration_ = static_cast<Configuration>(
         configuration_ & ~CHECK_INTERCEPTOR);
   }
   void skip_access_check() {
     configuration_ = static_cast<Configuration>(
         configuration_ & ~CHECK_ACCESS_CHECK);
   }
 
   /* ACCESS_CHECK */
   bool HasAccess(v8::AccessType access_type) const;
 
   /* PROPERTY */
   // HasProperty needs to be called before any of the other PROPERTY methods
   // below can be used. It ensures that we are able to provide a definite
   // answer, and loads extra information about the property.
   bool HasProperty();
+  void PrepareForDataProperty(Handle<Object> value);
+  void TransitionToDataProperty(Handle<Object> value,
+                                PropertyAttributes attributes,
+                                Object::StoreFromKeyed store_mode);
   PropertyKind property_kind() const {
     ASSERT(has_property_);
     return property_kind_;
   }
   PropertyDetails property_details() const {
     ASSERT(has_property_);
     return property_details_;
   }
+  int descriptor_number() const {
+    ASSERT(has_property_);
+    ASSERT_EQ(DESCRIPTOR, property_encoding_);
+    return number_;
+  }
   Handle<Object> GetAccessors() const;
   Handle<Object> GetDataValue() const;
+  void WriteDataValue(Handle<Object> value);
+
+  void InternalizeName();
 
   /* JSPROXY */
-
   Handle<JSProxy> GetJSProxy() const {
     return Handle<JSProxy>::cast(maybe_holder_.ToHandleChecked());
   }
 
  private:
   Handle<Map> GetReceiverMap() const;
 
   MUST_USE_RESULT bool NextHolder();
   State LookupInHolder();
   Handle<Object> FetchValue() const;
@@ skipping 32 matching lines @@
   MaybeHandle<Object> maybe_receiver_;
   MaybeHandle<JSReceiver> maybe_holder_;
 
   int number_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LOOKUP_H_