Move launchd code from chrome/browser/mac to base/mac.

chrome/browser/mac/scoped_launch_data.h

-// Copyright (c) 2011 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_MAC_SCOPED_LAUNCH_DATA_H_
-#define CHROME_BROWSER_MAC_SCOPED_LAUNCH_DATA_H_
-#pragma once
-
-#include <launch.h>
-
-#include <algorithm>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-
-namespace launchd {
-
-// Just like scoped_ptr<> but for launch_data_t.
-class ScopedLaunchData {
- public:
-  typedef launch_data_t element_type;
-
-  explicit ScopedLaunchData(launch_data_t object = NULL)
-      : object_(object) {
-  }
-
-  ~ScopedLaunchData() {
-    if (object_)
-      launch_data_free(object_);
-  }
-
-  void reset(launch_data_t object = NULL) {
-    if (object != object_) {
-      if (object_)
-        launch_data_free(object_);
-      object_ = object;
-    }
-  }
-
-  bool operator==(launch_data_t that) const {
-    return object_ == that;
-  }
-
-  bool operator!=(launch_data_t that) const {
-    return object_ != that;
-  }
-
-  operator launch_data_t() const {
-    return object_;
-  }
-
-  launch_data_t get() const {
-    return object_;
-  }
-
-  void swap(ScopedLaunchData& that) {
-    std::swap(object_, that.object_);
-  }
-
-  launch_data_t release() WARN_UNUSED_RESULT {
-    launch_data_t temp = object_;
-    object_ = NULL;
-    return temp;
-  }
-
- private:
-  launch_data_t object_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedLaunchData);
-};
-
-}  // namespace launchd
-
-#endif  // CHROME_BROWSER_MAC_SCOPED_LAUNCH_DATA_H_