Remove keyIdentifier.

third_party/WebKit/Source/platform/PlatformKeyboardEvent.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2008, 2009 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 38 matching lines @@
 #else
     // Can only change type from KeyDown to RawKeyDown or Char, as we lack information for other conversions.
     ASSERT(m_type == PlatformEvent::KeyDown);
     ASSERT(type == PlatformEvent::RawKeyDown || type == PlatformEvent::Char);
     m_type = type;
 
     if (type == RawKeyDown) {
         m_text = String();
         m_unmodifiedText = String();
     } else {
-        m_keyIdentifier = String();
         m_windowsVirtualKeyCode = 0;
 #if OS(MACOSX)
         if (m_text.length() == 1 && (m_text[0U] >= 0xF700 && m_text[0U] <= 0xF7FF)) {
             // According to NSEvents.h, OpenStep reserves the range 0xF700-0xF8FF for function keys. However, some actual private use characters
             // happen to be in this range, e.g. the Apple logo (Option+Shift+K).
             // 0xF7FF is an arbitrary cut-off.
             m_text = String();
             m_unmodifiedText = String();
         }
 #endif
@@ skipping 53 matching lines @@
     if (currentModifiers & ::cmdKey)
         modifiers |= MetaKey;
 #else
     // TODO(crbug.com/538289): Implement on other platforms.
     return static_cast<Modifiers>(0);
 #endif
     return static_cast<Modifiers>(modifiers);
 }
 
 } // namespace blink