Mojo C++ bindings: remove some usage of AssociatedGroup from user code.

components/leveldb/remote_iterator_unittest.cc

Index: components/leveldb/remote_iterator_unittest.cc
diff --git a/components/leveldb/remote_iterator_unittest.cc b/components/leveldb/remote_iterator_unittest.cc
index f67b140a0b60d3636643693bc2212c6cb2212f2e..8665711ae657791bc6bd926ecddc39de6447bac4 100644
--- a/components/leveldb/remote_iterator_unittest.cc
+++ b/components/leveldb/remote_iterator_unittest.cc
@@ -52,9 +52,8 @@ class RemoteIteratorTest : public service_manager::test::ServiceTest {
 
     mojom::DatabaseError error;
     base::RunLoop run_loop;
-    leveldb()->OpenInMemory(
-        MakeRequest(&database_, leveldb().associated_group()),
-        Capture(&error, run_loop.QuitClosure()));
+    leveldb()->OpenInMemory(MakeRequest(&database_),
+                            Capture(&error, run_loop.QuitClosure()));
     run_loop.Run();
     EXPECT_EQ(mojom::DatabaseError::OK, error);