Move base to DEPS

base/critical_closure.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_CRITICAL_CLOSURE_H_
-#define BASE_CRITICAL_CLOSURE_H_
-
-#include "base/callback.h"
-
-#if defined(OS_IOS)
-#include "base/bind.h"
-#include "base/ios/scoped_critical_action.h"
-#endif
-
-namespace base {
-
-namespace internal {
-
-#if defined(OS_IOS)
-// Returns true if multi-tasking is supported on this iOS device.
-bool IsMultiTaskingSupported();
-
-// This class wraps a closure so it can continue to run for a period of time
-// when the application goes to the background by using
-// |ios::ScopedCriticalAction|.
-template <typename R>
-class CriticalClosure {
- public:
-  explicit CriticalClosure(const Callback<R(void)>& closure)
-      : closure_(closure) {}
-
-  ~CriticalClosure() {}
-
-  R Run() {
-    return closure_.Run();
-  }
-
- private:
-  ios::ScopedCriticalAction critical_action_;
-  Callback<R(void)> closure_;
-
-  DISALLOW_COPY_AND_ASSIGN(CriticalClosure);
-};
-#endif  // defined(OS_IOS)
-
-}  // namespace internal
-
-// Returns a closure (which may return a result, but must not require any extra
-// arguments) that will continue to run for a period of time when the
-// application goes to the background if possible on platforms where
-// applications don't execute while backgrounded, otherwise the original task is
-// returned.
-//
-// Example:
-//   file_task_runner_->PostTask(
-//       FROM_HERE,
-//       MakeCriticalClosure(base::Bind(&WriteToDiskTask, path_, data)));
-//
-// Note new closures might be posted in this closure. If the new closures need
-// background running time, |MakeCriticalClosure| should be applied on them
-// before posting.
-#if defined(OS_IOS)
-template <typename R>
-Callback<R(void)> MakeCriticalClosure(const Callback<R(void)>& closure) {
-  DCHECK(internal::IsMultiTaskingSupported());
-  return base::Bind(&internal::CriticalClosure<R>::Run,
-                    Owned(new internal::CriticalClosure<R>(closure)));
-}
-#else  // defined(OS_IOS)
-template <typename R>
-inline Callback<R(void)> MakeCriticalClosure(const Callback<R(void)>& closure) {
-  // No-op for platforms where the application does not need to acquire
-  // background time for closures to finish when it goes into the background.
-  return closure;
-}
-#endif  // defined(OS_IOS)
-
-}  // namespace base
-
-#endif  // BASE_CRITICAL_CLOSURE_H_