Convert //base to use std::unique_ptr

base/test/test_discardable_memory_allocator.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 BASE_TEST_TEST_DISCARDABLE_MEMORY_ALLOCATOR_H_
 #define BASE_TEST_TEST_DISCARDABLE_MEMORY_ALLOCATOR_H_
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/memory/discardable_memory_allocator.h"
 
 namespace base {
 
 // TestDiscardableMemoryAllocator is a simple DiscardableMemoryAllocator
 // implementation that can be used for testing. It allocates one-shot
 // DiscardableMemory instances backed by heap memory.
 class TestDiscardableMemoryAllocator : public DiscardableMemoryAllocator {
  public:
   TestDiscardableMemoryAllocator();
   ~TestDiscardableMemoryAllocator() override;
 
   // Overridden from DiscardableMemoryAllocator:
-  scoped_ptr<DiscardableMemory> AllocateLockedDiscardableMemory(
+  std::unique_ptr<DiscardableMemory> AllocateLockedDiscardableMemory(
       size_t size) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestDiscardableMemoryAllocator);
 };
 
 }  // namespace base
 
 #endif  // BASE_TEST_TEST_DISCARDABLE_MEMORY_ALLOCATOR_H_