Reverting 3174. Aka reapplying 3150, 3151 and 3159. Aka api accessor

src/api.h

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 107 matching lines @@
 
 
 template <typename T>
 static inline v8::internal::Handle<v8::internal::Object> FromCData(T obj) {
   STATIC_ASSERT(sizeof(T) == sizeof(v8::internal::Address));
   return v8::internal::Factory::NewProxy(
       reinterpret_cast<v8::internal::Address>(reinterpret_cast<intptr_t>(obj)));
 }
 
 
+class ApiFunction {
+ public:
+  explicit ApiFunction(v8::internal::Address addr) : addr_(addr) { }
+  v8::internal::Address address() { return addr_; }
+ private:
+  v8::internal::Address addr_;
+};
+
+
 v8::Arguments::Arguments(v8::Local<v8::Value> data,
                          v8::Local<v8::Object> holder,
                          v8::Local<v8::Function> callee,
                          bool is_construct_call,
                          void** values, int length)
     : data_(data), holder_(holder), callee_(callee),
       is_construct_call_(is_construct_call),
       values_(values), length_(length) { }
 
 
@@ skipping 323 matching lines @@
 #ifdef DEBUG
   v8::ImplementationUtilities::ZapHandleRange(
       spare_,
       &spare_[kHandleBlockSize]);
 #endif
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_API_H_