Convert //cc from scoped_ptr to std::unique_ptr.

cc/base/container_util.h

 // Copyright 2015 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.
 
 #ifndef CC_BASE_CONTAINER_UTIL_H_
 #define CC_BASE_CONTAINER_UTIL_H_
 
-#include "base/memory/scoped_ptr.h"
 
 namespace cc {
 
 // Removes the front element from the container and returns it.
 template <typename Container>
 typename Container::value_type PopFront(Container* container) {
   typename Container::value_type element = std::move(container->front());
   container->pop_front();
   return element;
 }
 
 // Removes the back element from the container and returns it.
 template <typename Container>
 typename Container::value_type PopBack(Container* container) {
   typename Container::value_type element = std::move(container->back());
   container->pop_back();
   return element;
 }
 
 }  // namespace cc
 
 #endif  // CC_BASE_CONTAINER_UTIL_H_