Revert of ChromeDriver: Handle key events properly on Mac

content/browser/devtools/protocol/native_input_event_builder.h

-// Copyright 2017 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 CONTENT_BROWSER_DEVTOOLS_PROTOCOL_NATIVE_INPUT_EVENT_BUILDER_H_
-#define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_NATIVE_INPUT_EVENT_BUILDER_H_
-
-#include "content/public/browser/native_web_keyboard_event.h"
-
-namespace content {
-namespace protocol {
-
-class NativeInputEventBuilder {
- public:
-#if defined(OS_MACOSX)
-  // This returned object has a retain count of 1.
-  static gfx::NativeEvent CreateEvent(const NativeWebKeyboardEvent& event);
-#else
-  // We only need this for Macs because they require an OS event to process
-  // some keyboard events in browser (see: crbug.com/667387).
-  static gfx::NativeEvent CreateEvent(const NativeWebKeyboardEvent& event) {
-    return nullptr;
-  }
-#endif
-};
-
-}  // namespace protocol
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_NATIVE_INPUT_EVENT_BUILDER_H_