Move base to DEPS

base/ios/scoped_critical_action.h

-// Copyright (c) 2012 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 BASE_IOS_SCOPED_CRITICAL_ACTION_H_
-#define BASE_IOS_SCOPED_CRITICAL_ACTION_H_
-
-#include "base/memory/ref_counted.h"
-#include "base/synchronization/lock.h"
-
-namespace base {
-namespace ios {
-
-// This class attempts to allow the application to continue to run for a period
-// of time after it transitions to the background. The construction of an
-// instance of this class marks the beginning of a task that needs background
-// running time when the application is moved to the background and the
-// destruction marks the end of such a task.
-//
-// Note there is no guarantee that the task will continue to finish when the
-// application is moved to the background.
-//
-// This class should be used at times where leaving a task unfinished might be
-// detrimental to user experience. For example, it should be used to ensure that
-// the application has enough time to save important data or at least attempt to
-// save such data.
-class ScopedCriticalAction {
- public:
-  ScopedCriticalAction();
-  ~ScopedCriticalAction();
-
- private:
-  // Core logic; ScopedCriticalAction should not be reference counted so
-  // that it follows the normal pattern of stack-allocating ScopedFoo objects,
-  // but the expiration handler needs to have a reference counted object to
-  // refer to.
-  class Core : public base::RefCountedThreadSafe<Core> {
-   public:
-    Core();
-
-    // Informs the OS that the background task has completed.
-    void EndBackgroundTask();
-
-   private:
-    friend base::RefCountedThreadSafe<Core>;
-    ~Core();
-
-    // |UIBackgroundTaskIdentifier| returned by
-    // |beginBackgroundTaskWithExpirationHandler:| when marking the beginning of
-    // a long-running background task. It is defined as an |unsigned int|
-    // instead of a |UIBackgroundTaskIdentifier| so this class can be used in
-    // .cc files.
-    unsigned int background_task_id_;
-    Lock background_task_id_lock_;
-
-    DISALLOW_COPY_AND_ASSIGN(Core);
-  };
-
-  // The instance of the core that drives the background task.
-  scoped_refptr<Core> core_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedCriticalAction);
-};
-
-}  // namespace ios
-}  // namespace base
-
-#endif  // BASE_IOS_SCOPED_CRITICAL_ACTION_H_