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

chrome/browser/chromeos/policy/device_system_use_24hour_clock_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/shell.h"
 #include "ash/system/date/date_default_view.h"
 #include "ash/system/date/date_view.h"
 #include "ash/system/user/login_status.h"
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 33 matching lines @@
     // If the login display is still showing, exit gracefully.
     if (LoginDisplayHost::default_host()) {
       base::MessageLoop::current()->PostTask(FROM_HERE,
                                              base::Bind(&chrome::AttemptExit));
       content::RunMessageLoop();
     }
   }
 
  protected:
   void RefreshPolicyAndWaitDeviceSettingsUpdated() {
-    scoped_ptr<CrosSettings::ObserverSubscription> observer =
+    std::unique_ptr<CrosSettings::ObserverSubscription> observer =
         CrosSettings::Get()->AddSettingsObserver(
             kSystemUse24HourClock,
             base::MessageLoop::current()->QuitWhenIdleClosure());
 
     RefreshDevicePolicy();
     base::MessageLoop::current()->Run();
   }
 
   static bool GetSystemTrayDelegateShouldUse24HourClock() {
     chromeos::SystemTrayDelegateChromeOS* tray_delegate =
@@ skipping 99 matching lines @@
   EXPECT_TRUE(CrosSettings::Get()->GetBoolean(kSystemUse24HourClock,
                                               &system_use_24hour_clock));
   EXPECT_FALSE(system_use_24hour_clock);
   EXPECT_FALSE(GetSystemTrayDelegateShouldUse24HourClock());
   EXPECT_EQ(base::k12HourClock, TestGetPrimarySystemTrayTimeHourType());
   EXPECT_TRUE(TestPrimarySystemTrayHasDateDefaultView());
   EXPECT_EQ(base::k12HourClock, TestGetPrimarySystemTrayDateHourType());
 }
 
 }  // namespace chromeos