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

chrome/browser/extensions/api/content_settings/content_settings_custom_extension_provider.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 CHROME_BROWSER_EXTENSIONS_API_CONTENT_SETTINGS_CONTENT_SETTINGS_CUSTOM_EXTENSION_PROVIDER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_CONTENT_SETTINGS_CONTENT_SETTINGS_CUSTOM_EXTENSION_PROVIDER_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/api/content_settings/content_settings_store.h"
 #include "components/content_settings/core/browser/content_settings_observable_provider.h"
 
 namespace content_settings {
 
 // A content settings provider which manages settings defined by extensions.
 class CustomExtensionProvider : public ObservableProvider,
                           public extensions::ContentSettingsStore::Observer {
  public:
   CustomExtensionProvider(const scoped_refptr<extensions::ContentSettingsStore>&
                               extensions_settings,
                           bool incognito);
 
   ~CustomExtensionProvider() override;
 
   // ProviderInterface methods:
-  scoped_ptr<RuleIterator> GetRuleIterator(
+  std::unique_ptr<RuleIterator> GetRuleIterator(
       ContentSettingsType content_type,
       const ResourceIdentifier& resource_identifier,
       bool incognito) const override;
 
   bool SetWebsiteSetting(const ContentSettingsPattern& primary_pattern,
                          const ContentSettingsPattern& secondary_pattern,
                          ContentSettingsType content_type,
                          const ResourceIdentifier& resource_identifier,
                          base::Value* value) override;
 
@@ skipping 13 matching lines @@
 
   // The backend storing content setting rules defined by extensions.
   scoped_refptr<extensions::ContentSettingsStore> extensions_settings_;
 
   DISALLOW_COPY_AND_ASSIGN(CustomExtensionProvider);
 };
 
 }  // namespace content_settings
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_CONTENT_SETTINGS_CONTENT_SETTINGS_CUSTOM_EXTENSION_PROVIDER_H_