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

chrome/browser/ui/native_window_tracker_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 "chrome/browser/ui/native_window_tracker.h"
 
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "content/public/test/test_utils.h"
 
 typedef InProcessBrowserTest NativeWindowTrackerTest;
 
 IN_PROC_BROWSER_TEST_F(NativeWindowTrackerTest, Basic) {
   // Create a second browser to prevent the app from exiting when the browser is
   // closed.
   CreateBrowser(browser()->profile());
 
-  scoped_ptr<NativeWindowTracker> tracker =
+  std::unique_ptr<NativeWindowTracker> tracker =
       NativeWindowTracker::Create(browser()->window()->GetNativeWindow());
   EXPECT_FALSE(tracker->WasNativeWindowClosed());
 
   browser()->window()->Close();
   content::RunAllPendingInMessageLoop();
   EXPECT_TRUE(tracker->WasNativeWindowClosed());
 }