Make FunctionTemplate::HasInstance checks work with remote contexts.

test/unittests/api/remote-object-unittest.cc

Index: test/unittests/api/remote-object-unittest.cc
diff --git a/test/unittests/api/remote-object-unittest.cc b/test/unittests/api/remote-object-unittest.cc
index dc45d086ab86989221fff922e2f9885749387f78..7cc1f9be9b0685cc168cdf8cd2ddd8745953912b 100644
--- a/test/unittests/api/remote-object-unittest.cc
+++ b/test/unittests/api/remote-object-unittest.cc
@@ -59,4 +59,18 @@ TEST_F(RemoteObjectTest, CreationContextOfRemoteObject) {
   EXPECT_TRUE(remote_object->CreationContext().IsEmpty());
 }
 
+TEST_F(RemoteObjectTest, RemoteContextHasInstance) {
+  v8::Local<v8::FunctionTemplate> constructor_template =
+      v8::FunctionTemplate::New(isolate(), Constructor);
+  constructor_template->InstanceTemplate()->SetAccessCheckCallbackAndHandler(
+      AccessCheck, v8::NamedPropertyHandlerConfiguration(NamedGetter),
+      v8::IndexedPropertyHandlerConfiguration());
+
+  v8::Local<v8::Object> remote_context =
+      v8::Context::NewRemoteContext(isolate(),
+                                    constructor_template->InstanceTemplate())
+          .ToLocalChecked();
+  EXPECT_TRUE(constructor_template->HasInstance(remote_context));
+}
+
 }  // namespace v8