Revert of ChromeDriver: Handle key events properly on Mac

content/browser/devtools/protocol/native_input_event_builder_mac.mm

-// 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.
-
-#include <Cocoa/Cocoa.h>
-#include "base/strings/sys_string_conversions.h"
-#include "content/browser/devtools/protocol/native_input_event_builder.h"
-#include "third_party/WebKit/public/platform/WebInputEvent.h"
-
-namespace content {
-namespace protocol {
-
-// Mac requires a native event to emulate key events. This method gives
-// only crude capabilities (see: crbug.com/667387).
-// The returned object has a retain count of 1.
-gfx::NativeEvent NativeInputEventBuilder::CreateEvent(
-    const NativeWebKeyboardEvent& event) {
-  NSEventType type = NSKeyUp;
-  if (event.GetType() == blink::WebInputEvent::kRawKeyDown ||
-      event.GetType() == blink::WebInputEvent::kKeyDown)
-    type = NSKeyDown;
-  const blink::WebUChar* textStartAddr = &event.text[0];
-  const int textLength =
-      std::find(textStartAddr,
-                textStartAddr + NativeWebKeyboardEvent::kTextLengthCap, '\0') -
-      textStartAddr;
-  NSString* character =
-      base::SysUTF16ToNSString(base::string16(textStartAddr, textLength));
-  int modifiers = event.GetModifiers();
-  NSUInteger flags =
-      (modifiers & blink::WebInputEvent::kShiftKey ? NSShiftKeyMask : 0) |
-      (modifiers & blink::WebInputEvent::kControlKey ? NSControlKeyMask : 0) |
-      (modifiers & blink::WebInputEvent::kAltKey ? NSAlternateKeyMask : 0) |
-      (modifiers & blink::WebInputEvent::kMetaKey ? NSCommandKeyMask : 0);
-
-  return [[NSEvent keyEventWithType:type
-                           location:NSZeroPoint
-                      modifierFlags:flags
-                          timestamp:0
-                       windowNumber:0
-                            context:nil
-                         characters:character
-        charactersIgnoringModifiers:character
-                          isARepeat:NO
-                            keyCode:event.native_key_code] retain];
-};
-
-}  // namespace protocol
-}  // namespace content