Debugger: give item delegates a parent.

These delegates would otherwise be leaked. This is not a serious leak,
as a few (about 10) are created once and kept/used for the whole
lifetime of the application, but they do show up in leak-analysis tools.

Change-Id: I1e281f06f21ae828199078253ae5719668d26bbc
Reviewed-by: hjk <hjk121@nokiamail.com>

src/libs/utils/basetreeview.cpp

@@ -40,7 +40,7 @@ namespace Utils {
 class BaseTreeViewDelegate : public QItemDelegate
 {
 public:
-    BaseTreeViewDelegate() {}
+    BaseTreeViewDelegate(QObject *parent): QItemDelegate(parent) {}
 
     QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
                           const QModelIndex &index) const
@@ -64,7 +64,7 @@ BaseTreeView::BaseTreeView(QWidget *parent)
     setIconSize(QSize(10, 10));
     setSelectionMode(QAbstractItemView::ExtendedSelection);
     setUniformRowHeights(true);
-    setItemDelegate(new BaseTreeViewDelegate);
+    setItemDelegate(new BaseTreeViewDelegate(this));
     header()->setDefaultAlignment(Qt::AlignLeft);
     header()->setClickable(true);
 

src/libs/utils/historycompleter.cpp

@@ -65,8 +65,9 @@ public:
 class HistoryLineDelegate : public QItemDelegate
 {
 public:
-    HistoryLineDelegate()
-        : pixmap(QLatin1String(":/core/images/editclear.png"))
+    HistoryLineDelegate(QObject *parent)
+        : QItemDelegate(parent)
+        , pixmap(QLatin1String(":/core/images/editclear.png"))
     {}
 
     void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
@@ -85,7 +86,7 @@ public:
     HistoryLineView(HistoryCompleterPrivate *model_)
         : model(model_)
     {
-        HistoryLineDelegate *delegate = new HistoryLineDelegate;
+        HistoryLineDelegate *delegate = new HistoryLineDelegate(this);
         pixmapWidth = delegate->pixmap.width();
         setItemDelegate(delegate);
     }