Convert //extensions/browser/api from scoped_ptr to std::unique_ptr

extensions/browser/api/storage/settings_storage_quota_enforcer.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_API_STORAGE_SETTINGS_STORAGE_QUOTA_ENFORCER_H_
 #define EXTENSIONS_BROWSER_API_STORAGE_SETTINGS_STORAGE_QUOTA_ENFORCER_H_
 
 #include <stddef.h>
 
 #include <map>
+#include <memory>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "extensions/browser/value_store/value_store.h"
 
 namespace extensions {
 
 // Enforces total quota and a per-setting quota in bytes, and a maximum number
 // of setting keys, for a delegate storage area.
 class SettingsStorageQuotaEnforcer : public ValueStore {
  public:
   struct Limits {
     // The total quota in bytes.
     size_t quota_bytes;
 
     // The quota for each individual item in bytes.
     size_t quota_bytes_per_item;
 
     // The maximum number of items allowed.
     size_t max_items;
   };
 
   SettingsStorageQuotaEnforcer(const Limits& limits,
-                               scoped_ptr<ValueStore> delegate);
+                               std::unique_ptr<ValueStore> delegate);
 
   ~SettingsStorageQuotaEnforcer() override;
 
   // ValueStore implementation.
   size_t GetBytesInUse(const std::string& key) override;
   size_t GetBytesInUse(const std::vector<std::string>& keys) override;
   size_t GetBytesInUse() override;
   ReadResult Get(const std::string& key) override;
   ReadResult Get(const std::vector<std::string>& keys) override;
   ReadResult Get() override;
@@ skipping 16 matching lines @@
   void LazyCalculateUsage();
 
   // Frees the allocation of a setting in a record of total and per-setting
   // usage.
   void Free(const std::string& key);
 
   // Limits configuration.
   const Limits limits_;
 
   // The delegate storage area.
-  scoped_ptr<ValueStore> const delegate_;
+  std::unique_ptr<ValueStore> const delegate_;
 
   // Total bytes in used by |delegate_|. Includes both key lengths and
   // JSON-encoded values.
   size_t used_total_;
 
   // Have the total bytes used been calculated?
   bool usage_calculated_;
 
   // Map of item key to its size, including the key itself.
   std::map<std::string, size_t> used_per_setting_;
 
   DISALLOW_COPY_AND_ASSIGN(SettingsStorageQuotaEnforcer);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_STORAGE_SETTINGS_STORAGE_QUOTA_ENFORCER_H_