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_