[runtime][ic] Constant field tracking support.

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 26 matching lines @@
                               PropertyConstness constness,
                               Representation representation,
                               Handle<Object> wrapped_field_type);
 
   static Descriptor DataConstant(Handle<Name> key, Handle<Object> value,
                                  PropertyAttributes attributes) {
     return Descriptor(key, value, kData, attributes, kDescriptor, kConst,
                       value->OptimalRepresentation(), 0);
   }
 
+  static Descriptor DataConstant(Handle<Name> key, int field_index,
+                                 Handle<Object> value,
+                                 PropertyAttributes attributes);
+
   static Descriptor AccessorConstant(Handle<Name> key, Handle<Object> foreign,
                                      PropertyAttributes attributes) {
     return Descriptor(key, foreign, kAccessor, attributes, kDescriptor, kConst,
                       Representation::Tagged(), 0);
   }
 
  private:
   Handle<Name> key_;
   Handle<Object> value_;
   PropertyDetails details_;
@@ skipping 27 matching lines @@
 
   friend class DescriptorArray;
   friend class Map;
   friend class MapUpdater;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PROPERTY_H_