Debugger: Replace virtuals by capability flags.

Change-Id: If09efd21dc44e356eb575bb6170356fdbd409b39
Reviewed-on: http://codereview.qt.nokia.com/2625
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/qml/qmlengine.h

@@ -66,7 +66,6 @@ public:
     void showMessage(const QString &msg, int channel = LogDebug,
                      int timeout = -1) const;
     void filterApplicationMessage(const QString &msg, int channel);
-    virtual bool acceptsWatchesWhileRunning() const;
     QString toFileInProject(const QUrl &fileUrl);
     void inferiorSpontaneousStop();