Handle the "key" field as opposed to keyIdentifier field.

third_party/WebKit/Source/core/html/HTMLButtonElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 108 matching lines @@
             event->setDefaultHandled();
             m_isActivatedSubmit = false; // Do this in case submission was canceled.
         }
         if (form() && m_type == RESET) {
             form()->reset();
             event->setDefaultHandled();
         }
     }
 
     if (event->isKeyboardEvent()) {
-        if (event->type() == EventTypeNames::keydown && toKeyboardEvent(event)->keyIdentifier() == "U+0020") {
+        if (event->type() == EventTypeNames::keydown && toKeyboardEvent(event)->key() == " ") {
             setActive(true);
             // No setDefaultHandled() - IE dispatches a keypress in this case.
             return;
         }
         if (event->type() == EventTypeNames::keypress) {
             switch (toKeyboardEvent(event)->charCode()) {
             case '\r':
                 dispatchSimulatedClick(event);
                 event->setDefaultHandled();
                 return;
             case ' ':
                 // Prevent scrolling down the page.
                 event->setDefaultHandled();
                 return;
             }
         }
-        if (event->type() == EventTypeNames::keyup && toKeyboardEvent(event)->keyIdentifier() == "U+0020") {
+        if (event->type() == EventTypeNames::keyup && toKeyboardEvent(event)->key() == " ") {
             if (active())
                 dispatchSimulatedClick(event);
             event->setDefaultHandled();
             return;
         }
     }
 
     HTMLFormControlElement::defaultEventHandler(event);
 }
 
@@ skipping 65 matching lines @@
 }
 
 Node::InsertionNotificationRequest HTMLButtonElement::insertedInto(ContainerNode* insertionPoint)
 {
     InsertionNotificationRequest request = HTMLFormControlElement::insertedInto(insertionPoint);
     logAddElementIfIsolatedWorldAndInDocument("button", typeAttr, formmethodAttr, formactionAttr);
     return request;
 }
 
 } // namespace blink