Update from https://crrev.com/312600

base/event_recorder.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 BASE_EVENT_RECORDER_H_
-#define BASE_EVENT_RECORDER_H_
-
-#include "base/base_export.h"
-#include "base/basictypes.h"
-#include "build/build_config.h"
-
-#if defined(OS_WIN)
-#include <stdio.h>
-#include <string.h>
-#include <windows.h>
-#endif
-
-namespace base {
-
-class FilePath;
-
-// A class for recording and playing back keyboard and mouse input events.
-//
-// Note - if you record events, and the playback with the windows in
-//        different sizes or positions, the playback will fail.  When
-//        recording and playing, you should move the relevant windows
-//        to constant sizes and locations.
-// TODO(mbelshe) For now this is a singleton.  I believe that this class
-//        could be easily modified to:
-//             support two simultaneous recorders
-//             be playing back events while already recording events.
-//        Why?  Imagine if the product had a "record a macro" feature.
-//        You might be recording globally, while recording or playing back
-//        a macro.  I don't think two playbacks make sense.
-class BASE_EXPORT EventRecorder {
- public:
-  // Get the singleton EventRecorder.
-  // We can only handle one recorder/player at a time.
-  static EventRecorder* current() {
-    if (!current_)
-      current_ = new EventRecorder();
-    return current_;
-  }
-
-  // Starts recording events.
-  // Will clobber the file if it already exists.
-  // Returns true on success, or false if an error occurred.
-  bool StartRecording(const FilePath& filename);
-
-  // Stops recording.
-  void StopRecording();
-
-  // Is the EventRecorder currently recording.
-  bool is_recording() const { return is_recording_; }
-
-  // Plays events previously recorded.
-  // Returns true on success, or false if an error occurred.
-  bool StartPlayback(const FilePath& filename);
-
-  // Stops playback.
-  void StopPlayback();
-
-  // Is the EventRecorder currently playing.
-  bool is_playing() const { return is_playing_; }
-
-#if defined(OS_WIN)
-  // C-style callbacks for the EventRecorder.
-  // Used for internal purposes only.
-  LRESULT RecordWndProc(int nCode, WPARAM wParam, LPARAM lParam);
-  LRESULT PlaybackWndProc(int nCode, WPARAM wParam, LPARAM lParam);
-#endif
-
- private:
-  // Create a new EventRecorder.  Events are saved to the file filename.
-  // If the file already exists, it will be deleted before recording
-  // starts.
-  EventRecorder()
-      : is_recording_(false),
-        is_playing_(false),
-#if defined(OS_WIN)
-        journal_hook_(NULL),
-        file_(NULL),
-#endif
-        playback_first_msg_time_(0),
-        playback_start_time_(0) {
-#if defined(OS_WIN)
-    memset(&playback_msg_, 0, sizeof(playback_msg_));
-#endif
-  }
-  ~EventRecorder();
-
-  static EventRecorder* current_;  // Our singleton.
-
-  bool is_recording_;
-  bool is_playing_;
-#if defined(OS_WIN)
-  HHOOK journal_hook_;
-  FILE* file_;
-  EVENTMSG playback_msg_;
-#endif
-  int playback_first_msg_time_;
-  int playback_start_time_;
-
-  DISALLOW_COPY_AND_ASSIGN(EventRecorder);
-};
-
-}  // namespace base
-
-#endif // BASE_EVENT_RECORDER_H_