[WIP] Move media/capture to device/capture

media/capture/video/scoped_result_callback.h

-// Copyright 2016 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 MEDIA_CAPTURE_VIDEO_SCOPED_RESULT_CALLBACK_H_
-#define MEDIA_CAPTURE_VIDEO_SCOPED_RESULT_CALLBACK_H_
-
-#include "base/callback.h"
-#include "base/callback_helpers.h"
-#include "base/macros.h"
-
-namespace media {
-
-// This class guarantees that |callback_| has either been called or will pass it
-// to |on_error_callback_| on destruction. Inspired by ScopedWebCallbacks<>.
-template <typename CallbackType>
-class ScopedResultCallback {
- public:
-  using OnErrorCallback = base::Callback<void(const CallbackType&)>;
-  ScopedResultCallback(const CallbackType& callback,
-                       const OnErrorCallback& on_error_callback)
-      : callback_(callback), on_error_callback_(on_error_callback) {}
-
-  ~ScopedResultCallback() {
-    if (!callback_.is_null())
-      on_error_callback_.Run(callback_);
-  }
-
-  ScopedResultCallback(ScopedResultCallback&& other) {
-    *this = std::move(other);
-  }
-
-  ScopedResultCallback& operator=(ScopedResultCallback&& other) {
-    callback_ = other.callback_;
-    other.callback_.Reset();
-    on_error_callback_ = other.on_error_callback_;
-    other.on_error_callback_.Reset();
-    return *this;
-  }
-
-  template <typename... Args>
-  void Run(Args... args) {
-    on_error_callback_.Reset();
-    base::ResetAndReturn(&callback_).Run(std::forward<Args>(args)...);
-  }
-
- private:
-  CallbackType callback_;
-  OnErrorCallback on_error_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedResultCallback);
-};
-
-}  // namespace media
-
-#endif  // MEDIA_CAPTURE_VIDEO_SCOPED_RESULT_CALLBACK_H_