V8 support for cached accessors.

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 245 matching lines @@
   inline void UpdateProtector() {
     if (IsElement()) return;
     if (*name_ == heap()->is_concat_spreadable_symbol() ||
         *name_ == heap()->constructor_string() ||
         *name_ == heap()->species_symbol() ||
         *name_ == heap()->has_instance_symbol()) {
       InternalUpdateProtector();
     }
   }
 
+  // Lookup a 'cached' private property for an accessor.
+  // If not found returns false and leaves the LookupIterator unmodified.
+  bool TryLookupCachedProperty();
+  bool LookupCachedProperty();
+
  private:
   void InternalUpdateProtector();
 
   enum class InterceptorState {
     kUninitialized,
     kSkipNonMasking,
     kProcessNonMasking
   };
 
   Handle<Map> GetReceiverMap() const;
@@ skipping 79 matching lines @@
   const Handle<JSReceiver> initial_holder_;
   const uint32_t index_;
   uint32_t number_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_LOOKUP_H_