[ic] Support data handlers that represent simple field stores.

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/globals.h"
 #include "src/isolate.h"
@@ skipping 220 matching lines @@
     return property_details().attributes();
   }
   bool IsConfigurable() const { return property_details().IsConfigurable(); }
   bool IsReadOnly() const { return property_details().IsReadOnly(); }
   bool IsEnumerable() const { return property_details().IsEnumerable(); }
   Representation representation() const {
     return property_details().representation();
   }
   FieldIndex GetFieldIndex() const;
   Handle<FieldType> GetFieldType() const;
+  int GetFieldDescriptorIndex() const;
   int GetAccessorIndex() const;
   int GetConstantIndex() const;
   Handle<PropertyCell> GetPropertyCell() const;
   Handle<Object> GetAccessors() const;
   inline Handle<InterceptorInfo> GetInterceptor() const {
     DCHECK_EQ(INTERCEPTOR, state_);
     InterceptorInfo* result =
         IsElement() ? GetInterceptor<true>(JSObject::cast(*holder_))
                     : GetInterceptor<false>(JSObject::cast(*holder_));
     return handle(result, isolate_);
@@ skipping 103 matching lines @@
   const Handle<JSReceiver> initial_holder_;
   const uint32_t index_;
   uint32_t number_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_LOOKUP_H_