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

chrome/browser/chromeos/policy/display_rotation_default_handler.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_POLICY_DISPLAY_ROTATION_DEFAULT_HANDLER_H_
 #define CHROME_BROWSER_CHROMEOS_POLICY_DISPLAY_ROTATION_DEFAULT_HANDLER_H_
 
 #include <stdint.h>
 
+#include <memory>
 #include <set>
 
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/shell_observer.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "ui/gfx/display.h"
 
 namespace policy {
 
 // Enforces the device policy DisplayRotationDefault.
 // This class is created in ChromeShellDelegate::PreInit() and registers
 // itself with WindowTreeHostManager as Observer for display changes, and
 // with CrosSettings as Observer for setting changes. Whenever there is a change
 // in the display configuration, any new display with an id that is not already
@@ skipping 27 matching lines @@
   // its value, and whether it has a value, in member variables
   // |display_rotation_default_| and |policy_enabled_|. Returns true if the
   // setting changed.
   bool UpdateFromCrosSettings();
 
   bool policy_enabled_ = false;
   gfx::Display::Rotation display_rotation_default_ = gfx::Display::ROTATE_0;
   std::set<int64_t> rotated_displays_;
   bool rotation_in_progress_ = false;
 
-  scoped_ptr<chromeos::CrosSettings::ObserverSubscription> settings_observer_;
+  std::unique_ptr<chromeos::CrosSettings::ObserverSubscription>
+      settings_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayRotationDefaultHandler);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_CHROMEOS_POLICY_DISPLAY_ROTATION_DEFAULT_HANDLER_H_