Reland v8::Private and related APIs

test/cctest/test-object-observe.cc

 // Copyright 2012 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 669 matching lines @@
   LocalContext context(CcTest::isolate());
   CompileRun("var obj = {};"
              "var records = null;"
              "var observer = function(r) { records = r };"
              "Object.observe(obj, observer);");
   Local<Value> obj =
       context->Global()
           ->Get(v8::Isolate::GetCurrent()->GetCurrentContext(), v8_str("obj"))
           .ToLocalChecked();
   Local<Object>::Cast(obj)
-      ->SetHiddenValue(v8_str("foo"), Null(CcTest::isolate()));
+      ->SetPrivate(v8::Isolate::GetCurrent()->GetCurrentContext(),
+                   v8::Private::New(CcTest::isolate(), v8_str("foo")),
+                   Null(CcTest::isolate()))
+      .FromJust();
   CompileRun("");  // trigger delivery
   CHECK(CompileRun("records")->IsNull());
 }
 
 
 TEST(GetNotifierFromOtherContext) {
   HandleScope scope(CcTest::isolate());
   LocalContext context(CcTest::isolate());
   CompileRun("var obj = {};");
   Local<Value> instance = CompileRun("obj");
@@ skipping 326 matching lines @@
                          v8::Isolate::GetCurrent()->GetCurrentContext())
           .ToLocalChecked();
   env->Global()
       ->Set(v8::Isolate::GetCurrent()->GetCurrentContext(), v8_str("obj"),
             new_instance)
       .FromJust();
   v8::TryCatch try_catch(isolate);
   CompileRun("Object.getNotifier(obj)");
   CHECK(try_catch.HasCaught());
 }