Expose an API method for getting JSObject constructor name

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
===================================================================
--- test/cctest/test-api.cc	(revision 5888)
+++ test/cctest/test-api.cc	(working copy)
@@ -7819,6 +7819,31 @@
 }
 
 
+THREADED_TEST(ObjectGetConstructorName) {
+  v8::HandleScope scope;
+  LocalContext context;
+  v8_compile("function Parent() {};"
+             "function Child() {};"
+             "Child.prototype = new Parent();"
+             "var outer = { inner: function() { } };"
+             "var p = new Parent();"
+             "var c = new Child();"
+             "var x = new outer.inner();")->Run();
+
+  Local<v8::Value> p = context->Global()->Get(v8_str("p"));
+  CHECK(p->IsObject() && p->ToObject()->GetConstructorName()->Equals(
+      v8_str("Parent")));
+
+  Local<v8::Value> c = context->Global()->Get(v8_str("c"));
+  CHECK(c->IsObject() && c->ToObject()->GetConstructorName()->Equals(
+      v8_str("Child")));
+
+  Local<v8::Value> x = context->Global()->Get(v8_str("x"));
+  CHECK(x->IsObject() && x->ToObject()->GetConstructorName()->Equals(
+      v8_str("outer.inner")));
+}
+
+
 bool ApiTestFuzzer::fuzzing_ = false;
 i::Semaphore* ApiTestFuzzer::all_tests_done_=
   i::OS::CreateSemaphore(0);