use unique_ptr

Change-Id: I55ff9ae568a0d44c8ee8be922adf40e12038e436

sd/source/ui/func/undoback.cxx

@@ -18,6 +18,7 @@
  */
 
 #include "undoback.hxx"
+
 #include "sdpage.hxx"
 #include "sdresid.hxx"
 #include "strings.hrc"
@@ -36,7 +37,7 @@ SdBackgroundObjUndoAction::SdBackgroundObjUndoAction(
     const SfxItemSet& rItemSet)
 :   SdUndoAction(&rDoc),
     mrPage(rPage),
-    mpItemSet(new SfxItemSet(rItemSet)),
+    mpItemSet(o3tl::make_unique<SfxItemSet>(rItemSet)),
     mbHasFillBitmap(false)
 {
     OUString aString( SdResId( STR_UNDO_CHANGE_PAGEFORMAT ) );
@@ -44,22 +45,16 @@ SdBackgroundObjUndoAction::SdBackgroundObjUndoAction(
     saveFillBitmap(*mpItemSet);
 }
 
-SdBackgroundObjUndoAction::~SdBackgroundObjUndoAction()
-{
-    delete mpItemSet;
-}
-
 void SdBackgroundObjUndoAction::ImplRestoreBackgroundObj()
 {
-    SfxItemSet* pNew = new SfxItemSet(mrPage.getSdrPageProperties().GetItemSet());
+    std::unique_ptr<SfxItemSet> pNew = o3tl::make_unique<SfxItemSet>(mrPage.getSdrPageProperties().GetItemSet());
     mrPage.getSdrPageProperties().ClearItem();
     if (bool(mpFillBitmapItem))
         restoreFillBitmap(*mpItemSet);
     mpFillBitmapItem.reset();
     mbHasFillBitmap = false;
     mrPage.getSdrPageProperties().PutItemSet(*mpItemSet);
-    delete mpItemSet;
-    mpItemSet = pNew;
+    mpItemSet = std::move(pNew);
     saveFillBitmap(*mpItemSet);
 
     // tell the page that it's visualization has changed

sd/source/ui/inc/undoback.hxx

@@ -21,6 +21,7 @@
 #define INCLUDED_SD_SOURCE_UI_INC_UNDOBACK_HXX
 
 #include <memory>
+
 #include "sdundo.hxx"
 
 class SdDrawDocument;
@@ -34,7 +35,7 @@ class SdBackgroundObjUndoAction : public SdUndoAction
 private:
 
     SdPage&                 mrPage;
-    SfxItemSet*             mpItemSet;
+    std::unique_ptr<SfxItemSet> mpItemSet;
     std::unique_ptr<SfxPoolItem> mpFillBitmapItem;
     bool                    mbHasFillBitmap;
 
@@ -49,7 +50,6 @@ public:
                                 SdDrawDocument& rDoc,
                                 SdPage& rPage,
                                 const SfxItemSet& rItemSet);
-    virtual                 ~SdBackgroundObjUndoAction();
 
     virtual void            Undo() override;
     virtual void            Redo() override;