Implement IsIndependent(Isolate*)

test/cctest/test-api.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 5297 matching lines @@
   v8::Persistent<Context> context = Context::New();
   Context::Scope context_scope(context);
 
   v8::Persistent<v8::Object> object_a;
 
   {
     v8::HandleScope handle_scope;
     object_a = v8::Persistent<v8::Object>::New(v8::Object::New());
   }
 
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
   bool object_a_disposed = false;
   object_a.MakeWeak(&object_a_disposed, &DisposeAndSetFlag);
   CHECK(!object_a.IsIndependent());
+  CHECK(!object_a.IsIndependent(isolate));
   object_a.MarkIndependent();
   CHECK(object_a.IsIndependent());
+  CHECK(object_a.IsIndependent(isolate));
   HEAP->PerformScavenge();
   CHECK(object_a_disposed);
 }
 
 
 static void InvokeScavenge() {
   HEAP->PerformScavenge();
 }
 
 
@@ skipping 12429 matching lines @@
 
   i::Semaphore* sem_;
   volatile int sem_value_;
 };
 
 
 THREADED_TEST(SemaphoreInterruption) {
   ThreadInterruptTest().RunTest();
 }
 #endif  // WIN32