Convert //ash from scoped_ptr to std::unique_ptr

ash/wm/screen_dimmer_unittest.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 "ash/wm/screen_dimmer.h"
 
+#include <memory>
+
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/dim_window.h"
-#include "base/memory/scoped_ptr.h"
 //#include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/test/test_windows.h"
 #include "ui/compositor/layer.h"
 
 namespace ash {
 namespace test {
 
 class ScreenDimmerTest : public AshTestBase {
  public:
   ScreenDimmerTest() : dimmer_(nullptr) {}
@@ skipping 66 matching lines @@
 TEST_F(ScreenDimmerTest, RootDimmer) {
   ScreenDimmer* root_dimmer = ScreenDimmer::GetForRoot();
   // -100 is the magic number for root window.
   EXPECT_EQ(root_dimmer, ScreenDimmer::FindForTest(-100));
   EXPECT_EQ(nullptr, ScreenDimmer::FindForTest(-1));
 }
 
 TEST_F(ScreenDimmerTest, DimAtBottom) {
   ScreenDimmer* root_dimmer = ScreenDimmer::GetForRoot();
   aura::Window* root_window = Shell::GetPrimaryRootWindow();
-  scoped_ptr<aura::Window> window(
+  std::unique_ptr<aura::Window> window(
       aura::test::CreateTestWindowWithId(1, root_window));
   root_dimmer->SetDimming(true);
   std::vector<aura::Window*>::const_iterator dim_iter =
       std::find(root_window->children().begin(), root_window->children().end(),
                 GetDimWindow());
   ASSERT_TRUE(dim_iter != root_window->children().end());
   // Dim layer is at top.
   EXPECT_EQ(*dim_iter, *root_window->children().rbegin());
 
   root_dimmer->SetDimming(false);
   root_dimmer->set_at_bottom(true);
   root_dimmer->SetDimming(true);
 
   dim_iter = std::find(root_window->children().begin(),
                        root_window->children().end(), GetDimWindow());
   ASSERT_TRUE(dim_iter != root_window->children().end());
   // Dom layer is at the bottom.
   EXPECT_EQ(*dim_iter, *root_window->children().begin());
 }
 
 }  // namespace test
 }  // namespace ash