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

chrome/browser/chromeos/accessibility/sticky_keys_browsertest.cc

 // Copyright 2013 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 <stddef.h>
 
 #include "ash/shell.h"
 #include "ash/sticky_keys/sticky_keys_controller.h"
 #include "ash/sticky_keys/sticky_keys_overlay.h"
 #include "ash/system/tray/system_tray.h"
@@ skipping 41 matching lines @@
   ash::SystemTray* GetSystemTray() {
     return ash::Shell::GetInstance()->GetPrimarySystemTray();
   }
 
   void SendKeyPress(ui::KeyboardCode key) {
     event_generator_->PressKey(key, ui::EF_NONE);
     event_generator_->ReleaseKey(key, ui::EF_NONE);
   }
 
   content::NotificationRegistrar registrar_;
-  scoped_ptr<ui::test::EventGenerator> event_generator_;
+  std::unique_ptr<ui::test::EventGenerator> event_generator_;
 
   DISALLOW_COPY_AND_ASSIGN(StickyKeysBrowserTest);
 };
 
 IN_PROC_BROWSER_TEST_F(StickyKeysBrowserTest, OpenTrayMenu) {
   EnableStickyKeys();
 
   // Open system tray bubble with shortcut.
   SendKeyPress(ui::VKEY_MENU); // alt key.
   SendKeyPress(ui::VKEY_SHIFT);
@@ skipping 149 matching lines @@
   EXPECT_TRUE(sticky_keys_overlay->is_visible());
   DisableStickyKeys();
   EXPECT_FALSE(controller->GetOverlayForTest());
   for (auto key_code : modifier_keys) {
     SendKeyPress(key_code);
     EXPECT_FALSE(controller->GetOverlayForTest());
   }
 }
 
 }  // namespace chromeos