Make all LayerAnimationElement::Create*Element return unique_ptr

ash/accelerators/accelerator_controller_delegate_aura.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 "ash/accelerators/accelerator_controller_delegate_aura.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <utility>
@@ skipping 169 matching lines @@
   aura::Window* active_window = wm::GetActiveWindow();
   if (active_window) {
     // The rotation animation bases its target transform on the current
     // rotation and position. Since there could be an animation in progress
     // right now, queue this animation so when it starts it picks up a neutral
     // rotation and position. Use replace so we only enqueue one at a time.
     active_window->layer()->GetAnimator()->set_preemption_strategy(
         ui::LayerAnimator::REPLACE_QUEUED_ANIMATIONS);
     active_window->layer()->GetAnimator()->StartAnimation(
         new ui::LayerAnimationSequence(
-            new WindowRotation(360, active_window->layer())));
+            base::MakeUnique<WindowRotation>(360, active_window->layer())));
   }
 }
 
 void HandleShowSystemTrayBubble() {
   base::RecordAction(UserMetricsAction("Accel_Show_System_Tray_Bubble"));
   RootWindowController* controller =
       RootWindowController::ForTargetRootWindow();
   SystemTray* tray = controller->GetSystemTray();
   if (!tray->HasSystemBubble()) {
     tray->ShowDefaultView(BUBBLE_CREATE_NEW);
@@ skipping 299 matching lines @@
           message_center::NotifierId(
               message_center::NotifierId::SYSTEM_COMPONENT,
               system_notifier::kNotifierDeprecatedAccelerator),
           message_center::RichNotificationData(),
           new DeprecatedAcceleratorNotificationDelegate));
   message_center::MessageCenter::Get()->AddNotification(
       std::move(notification));
 }
 
 }  // namespace ash