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

chrome/browser/chromeos/login/ui/user_adding_screen_browsertest.cc

 // 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.
 
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "base/macros.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker_tester.h"
@@ skipping 75 matching lines @@
     }
   }
 
   int user_adding_started() { return user_adding_started_; }
 
   int user_adding_finished() { return user_adding_finished_; }
 
  private:
   int user_adding_started_ = 0;
   int user_adding_finished_ = 0;
-  scoped_ptr<base::RunLoop> run_loop_;
+  std::unique_ptr<base::RunLoop> run_loop_;
   bool finished_ = false;  // True if OnUserAddingFinished() has been called
                            // before WaitUntilUserAddingFinishedOrCancelled().
 
   DISALLOW_COPY_AND_ASSIGN(UserAddingScreenTest);
 };
 
 IN_PROC_BROWSER_TEST_F(UserAddingScreenTest, PRE_CancelAdding) {
   RegisterUser(kTestUsers[0]);
   RegisterUser(kTestUsers[1]);
   RegisterUser(kTestUsers[2]);
@@ skipping 177 matching lines @@
 
   UserAddingScreen::Get()->Start();
   content::RunAllPendingInMessageLoop();
   CheckScreenIsVisible();
   UserAddingScreen::Get()->Cancel();
   WaitUntilUserAddingFinishedOrCancelled();
   content::RunAllPendingInMessageLoop();
 }
 
 }  // namespace chromeos