Replace scoped_ptr with std::unique_ptr in //ui

ui/views/accessibility/ax_aura_obj_cache_unittest.cc

 // Copyright 2016 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/views/accessibility/ax_aura_obj_cache.h"
 #include "ui/views/test/widget_test.h"
 
 namespace views {
 namespace test {
 
 namespace {
 
-// This class can be used as a deleter for scoped_ptr<Widget>
+// This class can be used as a deleter for std::unique_ptr<Widget>
 // to call function Widget::CloseNow automatically.
 struct WidgetCloser {
   inline void operator()(Widget* widget) const { widget->CloseNow(); }
 };
 
-using WidgetAutoclosePtr = scoped_ptr<Widget, WidgetCloser>;
+using WidgetAutoclosePtr = std::unique_ptr<Widget, WidgetCloser>;
 }
 
 class AXAuraObjCacheTest : public WidgetTest {
  public:
   AXAuraObjCacheTest() {}
   ~AXAuraObjCacheTest() override {}
 };
 
 TEST_F(AXAuraObjCacheTest, TestViewRemoval) {
   WidgetAutoclosePtr widget(CreateTopLevelPlatformWidget());
@@ skipping 22 matching lines @@
   ASSERT_EQ(-1, cache->GetID(parent));
   ASSERT_EQ(-1, cache->GetID(child));
 
   // Explicitly delete |parent| to prevent a memory leak, since calling
   // RemoveChildView() doesn't delete it.
   delete parent;
 }
 
 }  // namespace test
 }  // namespace views