queryCommandSupported() should return 'true' for cut/copy/paste editing commands

Source/core/editing/EditorCommand.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Igalia S.L.
  *
  * 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.
@@ skipping 1728 matching lines @@
     frame().document()->updateLayoutIgnorePendingStylesheets();
     blink::Platform::current()->histogramSparse("WebCore.Editing.Commands", m_command->idForUserMetrics);
     return m_command->execute(*m_frame, triggeringEvent, m_source, parameter);
 }
 
 bool Editor::Command::execute(Event* triggeringEvent) const
 {
     return execute(String(), triggeringEvent);
 }
 
-bool Editor::Command::isSupported() const
+bool Editor::Command::isSupported(bool enabled) const
 {
     if (!m_command)
         return false;
     switch (m_source) {
     case CommandFromMenuOrKeyBinding:
         return true;
     case CommandFromDOM:
-        return m_command->isSupportedFromDOM(m_frame.get());
+        return enabled ? m_command->isSupportedFromDOM(m_frame.get()) : true;
     }
     ASSERT_NOT_REACHED();
     return false;
 }
 
 bool Editor::Command::isEnabled(Event* triggeringEvent) const
 {
-    if (!isSupported() || !m_frame)
+    if (!isSupported(true) || !m_frame)
         return false;
     return m_command->isEnabled(*m_frame, triggeringEvent, m_source);
 }
 
 TriState Editor::Command::state(Event* triggeringEvent) const
 {
     if (!isSupported() || !m_frame)
         return FalseTriState;
     return m_command->state(*m_frame, triggeringEvent);
 }
@@ skipping 11 matching lines @@
 {
     return m_command && m_command->isTextInsertion;
 }
 
 int Editor::Command::idForHistogram() const
 {
     return isSupported() ? m_command->idForUserMetrics : 0;
 }
 
 } // namespace blink