Update from https://crrev.com/320343

base/containers/stack_container.h

 // 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.
 
 #ifndef BASE_CONTAINERS_STACK_CONTAINER_H_
 #define BASE_CONTAINERS_STACK_CONTAINER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 158 matching lines @@
   const typename Allocator::Source& stack_data() const {
     return stack_data_;
   }
 #endif
 
  protected:
   typename Allocator::Source stack_data_;
   Allocator allocator_;
   ContainerType container_;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(StackContainer);
 };
 
 // StackString -----------------------------------------------------------------
 
 template<size_t stack_capacity>
 class StackString : public StackContainer<
     std::basic_string<char,
                       std::char_traits<char>,
                       StackAllocator<char, stack_capacity> >,
@@ skipping 67 matching lines @@
   // operator-> (using "->at()" does exception stuff we don't want).
   T& operator[](size_t i) { return this->container().operator[](i); }
   const T& operator[](size_t i) const {
     return this->container().operator[](i);
   }
 };
 
 }  // namespace base
 
 #endif  // BASE_CONTAINERS_STACK_CONTAINER_H_