Convert //ios from scoped_ptr to std::unique_ptr.

ios/chrome/browser/signin/signin_client_impl.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 IOS_CHROME_BROWSER_SIGNIN_SIGNIN_CLIENT_IMPL_H_
 #define IOS_CHROME_BROWSER_SIGNIN_SIGNIN_CLIENT_IMPL_H_
 
+#include <memory>
+
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "components/signin/core/browser/signin_client.h"
 #include "components/signin/core/browser/signin_error_controller.h"
 #include "google_apis/gaia/gaia_oauth_client.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 #include "net/base/network_change_notifier.h"
 
 namespace content_settings {
 class CookieSettings;
 }
 
@@ skipping 41 matching lines @@
       const std::string& source,
       net::URLRequestContextGetter* getter) override;
 
   // KeyedService implementation.
   void Shutdown() override;
 
   // Returns a string describing the chrome version environment. Version format:
   // <Build Info> <OS> <Version number> (<Last change>)<channel or "-devel">
   // If version information is unavailable, returns "invalid."
   std::string GetProductVersion() override;
-  scoped_ptr<CookieChangedSubscription> AddCookieChangedCallback(
+  std::unique_ptr<CookieChangedSubscription> AddCookieChangedCallback(
       const GURL& url,
       const std::string& name,
       const net::CookieStore::CookieChangedCallback& callback) override;
   void OnSignedIn(const std::string& account_id,
                   const std::string& gaia_id,
                   const std::string& username,
                   const std::string& password) override;
 
   // SigninErrorController::Observer implementation.
   void OnErrorChanged() override;
 
   // gaia::GaiaOAuthClient::Delegate implementation.
   void OnGetTokenInfoResponse(
-      scoped_ptr<base::DictionaryValue> token_info) override;
+      std::unique_ptr<base::DictionaryValue> token_info) override;
   void OnOAuthError() override;
   void OnNetworkError(int response_code) override;
 
   // OAuth2TokenService::Consumer implementation
   void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
                          const std::string& access_token,
                          const base::Time& expiration_time) override;
   void OnGetTokenFailure(const OAuth2TokenService::Request* request,
                          const GoogleServiceAuthError& error) override;
 
   // net::NetworkChangeController::NetworkChangeObserver implementation.
   void OnNetworkChanged(
       net::NetworkChangeNotifier::ConnectionType type) override;
 
  private:
   ios::ChromeBrowserState* browser_state_;
 
   SigninErrorController* signin_error_controller_;
   std::list<base::Closure> delayed_callbacks_;
 
-  scoped_ptr<gaia::GaiaOAuthClient> oauth_client_;
-  scoped_ptr<OAuth2TokenService::Request> oauth_request_;
+  std::unique_ptr<gaia::GaiaOAuthClient> oauth_client_;
+  std::unique_ptr<OAuth2TokenService::Request> oauth_request_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninClientImpl);
 };
 
 #endif  // IOS_CHROME_BROWSER_SIGNIN_SIGNIN_CLIENT_IMPL_H_