Add presubmit check for scoped_ptr usage.

ui/aura/test/aura_test_helper.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/aura/test/aura_test_helper.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/default_capture_client.h"
@@ skipping 42 matching lines @@
       << "AuraTestHelper::TearDown() never called.";
 }
 
 void AuraTestHelper::SetUp(ui::ContextFactory* context_factory) {
   setup_called_ = true;
 
   Env::CreateInstance(true);
   Env::GetInstance()->set_context_factory(context_factory);
   // Unit tests generally don't want to query the system, rather use the state
   // from RootWindow.
-  EnvTestHelper(Env::GetInstance()).SetInputStateLookup(
-      scoped_ptr<InputStateLookup>());
+  EnvTestHelper(Env::GetInstance()).SetInputStateLookup(nullptr);
 
   ui::InitializeInputMethodForTesting();
 
   gfx::Size host_size(800, 600);
   test_screen_.reset(TestScreen::Create(host_size));
   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, test_screen_.get());
   host_.reset(test_screen_->CreateHostForPrimaryDisplay());
 
   focus_client_.reset(new TestFocusClient);
   client::SetFocusClient(root_window(), focus_client_.get());
@@ skipping 32 matching lines @@
 
 void AuraTestHelper::RunAllPendingInMessageLoop() {
   // TODO(jbates) crbug.com/134753 Find quitters of this RunLoop and have them
   //              use run_loop.QuitClosure().
   base::RunLoop run_loop;
   run_loop.RunUntilIdle();
 }
 
 }  // namespace test
 }  // namespace aura