Convert //ash from scoped_ptr to std::unique_ptr

ash/system/chromeos/power/power_event_observer_unittest.cc

 // Copyright 2013 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/system/chromeos/power/power_event_observer.h"
 
+#include <memory>
+
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/power_manager_client.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/compositor/compositor.h"
 
 namespace ash {
 
 class PowerEventObserverTest : public test::AshTestBase {
@@ skipping 16 matching lines @@
   int GetNumVisibleCompositors() {
     int result = 0;
     for (const auto& window : Shell::GetAllRootWindows()) {
       if (window->GetHost()->compositor()->IsVisible())
         ++result;
     }
 
     return result;
   }
 
-  scoped_ptr<PowerEventObserver> observer_;
+  std::unique_ptr<PowerEventObserver> observer_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PowerEventObserverTest);
 };
 
 TEST_F(PowerEventObserverTest, LockBeforeSuspend) {
   chromeos::PowerManagerClient* client =
       chromeos::DBusThreadManager::Get()->GetPowerManagerClient();
   ASSERT_EQ(0, client->GetNumPendingSuspendReadinessCallbacks());
 
@@ skipping 95 matching lines @@
   // request.  The real PowerManagerClient would reset its internal counter in
   // this situation but the stub client is not that smart.
   EXPECT_EQ(2, client->GetNumPendingSuspendReadinessCallbacks());
 
   observer_->OnLockAnimationsComplete();
   EXPECT_EQ(1, client->GetNumPendingSuspendReadinessCallbacks());
   EXPECT_EQ(0, GetNumVisibleCompositors());
 }
 
 }  // namespace ash