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

extensions/browser/api/runtime/runtime_api.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_RUNTIME_RUNTIME_API_H_
 #define EXTENSIONS_BROWSER_API_RUNTIME_RUNTIME_API_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 84 matching lines @@
   void OnBackgroundHostStartup(const Extension* extension) override;
 
   // Pref related functions that deals with info about installed extensions that
   // has not been loaded yet.
   // Used to send chrome.runtime.onInstalled event upon loading the extensions.
   bool ReadPendingOnInstallInfoFromPref(const ExtensionId& extension_id,
                                         base::Version* previous_version);
   void RemovePendingOnInstallInfoFromPref(const ExtensionId& extension_id);
   void StorePendingOnInstallInfoToPref(const Extension* extension);
 
-  scoped_ptr<RuntimeAPIDelegate> delegate_;
+  std::unique_ptr<RuntimeAPIDelegate> delegate_;
 
   content::BrowserContext* browser_context_;
 
   // True if we should dispatch the chrome.runtime.onInstalled event with
   // reason "chrome_update" upon loading each extension.
   bool dispatch_chrome_updated_event_;
 
   content::NotificationRegistrar registrar_;
 
   // Listen to extension notifications.
@@ skipping 121 matching lines @@
                              RUNTIME_GETPACKAGEDIRECTORYENTRY)
 
  protected:
   ~RuntimeGetPackageDirectoryEntryFunction() override {}
   ResponseAction Run() override;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_RUNTIME_RUNTIME_API_H_