ScxmlEditor: Avoid use of global object pool

Including some code cosmetics.

Change-Id: I6d7f11404ea489020d0c74e43cbe25cdcaa48e85
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/scxmleditor/scxmleditorplugin.cpp

@@ -24,34 +24,21 @@
 ****************************************************************************/
 
 #include "scxmleditorplugin.h"
-#include "scxmleditorconstants.h"
 #include "scxmleditorfactory.h"
 
-#include <coreplugin/coreconstants.h>
 #include <coreplugin/designmode.h>
-#include <coreplugin/icontext.h>
-#include <coreplugin/icore.h>
-
-#include <QAction>
-#include <QMainWindow>
-#include <QMenu>
-#include <QMessageBox>
-
-#include <QtPlugin>
 
 using namespace Core;
-using namespace ScxmlEditor::Internal;
 
-ScxmlEditorPlugin::ScxmlEditorPlugin()
-{
-}
+namespace ScxmlEditor {
+namespace Internal {
 
 bool ScxmlEditorPlugin::initialize(const QStringList &arguments, QString *errorString)
 {
     Q_UNUSED(arguments)
     Q_UNUSED(errorString)
 
-    addAutoReleasedObject(new ScxmlEditorFactory);
+    (void) new ScxmlEditorFactory(this);
 
     return true;
 }
@@ -61,7 +48,5 @@ void ScxmlEditorPlugin::extensionsInitialized()
     DesignMode::setDesignModeIsRequired();
 }
 
-ExtensionSystem::IPlugin::ShutdownFlag ScxmlEditorPlugin::aboutToShutdown()
-{
-    return SynchronousShutdown;
-}
+} // Internal
+} // ScxmlEditor