convert //gpu to std::unique_ptr

gpu/vulkan/vulkan_device_queue.cc

 // Copyright (c) 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 "gpu/vulkan/vulkan_device_queue.h"
 
 #include <unordered_set>
 #include <vector>
 
 #include "gpu/vulkan/vulkan_command_pool.h"
@@ skipping 148 matching lines @@
     vkDestroyDevice(vk_device_, nullptr);
     vk_device_ = VK_NULL_HANDLE;
   }
 
   vk_queue_ = VK_NULL_HANDLE;
   vk_queue_index_ = 0;
 
   vk_physical_device_ = VK_NULL_HANDLE;
 }
 
-scoped_ptr<VulkanCommandPool> VulkanDeviceQueue::CreateCommandPool() {
-  scoped_ptr<VulkanCommandPool> command_pool(new VulkanCommandPool(this));
+std::unique_ptr<VulkanCommandPool> VulkanDeviceQueue::CreateCommandPool() {
+  std::unique_ptr<VulkanCommandPool> command_pool(new VulkanCommandPool(this));
   if (!command_pool->Initialize())
     return nullptr;
 
   return command_pool;
 }
 
 }  // namespace gpu