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

chrome/browser/chromeos/file_manager/file_watcher_unittest.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 "chrome/browser/chromeos/file_manager/file_watcher.h"
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 98 matching lines @@
 TEST_F(FileManagerFileWatcherTest, WatchLocalFile) {
   const base::FilePath kVirtualPath =
       base::FilePath::FromUTF8Unsafe("foo/bar.txt");
   const char kExtensionId[] = "extension-id";
 
   // Create a temporary directory.
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 
   // See the comment at the end of this function for why scoped_ptr is used.
-  scoped_ptr<FileWatcher> file_watcher(
-      new FileWatcher(kVirtualPath));
+  std::unique_ptr<FileWatcher> file_watcher(new FileWatcher(kVirtualPath));
   file_watcher->AddExtension(kExtensionId);
 
   // Start watching changes in the temporary directory.
   base::FilePath changed_path;
   bool watcher_created = false;
   bool on_change_error = false;
   base::RunLoop run_loop;
   file_watcher->WatchLocalFile(
       temp_dir.path(),
       CreateQuitCallback(
@@ skipping 16 matching lines @@
   // This is ugly, but FileWatcher should be deleted explicitly here, and
   // spin the message loop so the base::FilePathWatcher is deleted.
   // Otherwise, base::FilePathWatcher may detect a change when the temporary
   // directory is deleted, which may result in crash.
   file_watcher.reset();
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace
 }  // namespace file_manager.