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

chrome/browser/chromeos/login/signin/oauth2_token_initializer.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 CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_OAUTH2_TOKEN_INITIALIZER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_OAUTH2_TOKEN_INITIALIZER_H_
 
+#include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/login/signin/oauth2_token_fetcher.h"
 #include "chromeos/login/auth/user_context.h"
 
 namespace chromeos {
 
 // Performs initial fetch of OAuth2 Tokens.
 class OAuth2TokenInitializer final : public OAuth2TokenFetcher::Delegate {
  public:
   // Callback to be invoked after initialization is done.
   using FetchOAuth2TokensCallback =
       base::Callback<void(bool success, const UserContext& user_context)>;
 
   OAuth2TokenInitializer();
   ~OAuth2TokenInitializer() override;
 
   // Fetch OAuth2 tokens.
   void Start(const UserContext& context,
              const FetchOAuth2TokensCallback& callback);
 
  private:
   // OAuth2TokenFetcher::Delegate overrides.
   void OnOAuth2TokensAvailable(
       const GaiaAuthConsumer::ClientOAuthResult& oauth2_tokens) override;
   void OnOAuth2TokensFetchFailed() override;
 
   UserContext user_context_;
   FetchOAuth2TokensCallback callback_;
-  scoped_ptr<OAuth2TokenFetcher> oauth2_token_fetcher_;
+  std::unique_ptr<OAuth2TokenFetcher> oauth2_token_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(OAuth2TokenInitializer);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_OAUTH2_TOKEN_INITIALIZER_H_