Remove Dashboard support and supporting files.

Source/WebCore/page/mac/EventHandlerMac.mm

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 694 matching lines @@
     
     return handlingOptionTab;
 }
 
 bool EventHandler::needsKeyboardEventDisambiguationQuirks() const
 {
     Settings* settings = m_frame->settings();
     if (!settings)
         return false;
 
-#if ENABLE(DASHBOARD_SUPPORT)
-    if (settings->usesDashboardBackwardCompatibilityMode())
-        return true;
-#endif
-        
     if (settings->needsKeyboardEventDisambiguationQuirks())
         return true;
 
     return false;
 }
 
 unsigned EventHandler::accessKeyModifiers()
 {
     // Control+Option key combinations are usually unused on Mac OS X, but not when VoiceOver is enabled.
     // So, we use Control in this case, even though it conflicts with Emacs-style key bindings.
     // See <https://bugs.webkit.org/show_bug.cgi?id=21107> for more detail.
     if (AXObjectCache::accessibilityEnhancedUserInterfaceEnabled())
         return PlatformEvent::CtrlKey;
 
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 }
 
 }