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

Source/core/editing/EditorCommand.cpp

Index: Source/core/editing/EditorCommand.cpp
diff --git a/Source/core/editing/EditorCommand.cpp b/Source/core/editing/EditorCommand.cpp
index 69e23abd25560ce05bbb70eb874db971de7a5d82..cdb82fdc73b6e7e769bd79d94e1538b3330c4556 100644
--- a/Source/core/editing/EditorCommand.cpp
+++ b/Source/core/editing/EditorCommand.cpp
@@ -1746,7 +1746,7 @@ 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;
@@ -1754,7 +1754,7 @@ bool Editor::Command::isSupported() const
     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;
@@ -1762,7 +1762,7 @@ bool Editor::Command::isSupported() const
 
 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);
 }