Revert "analyzer: move convenience factory back to base plugin"

This reverts commit 06a41da04e.

Change-Id: I06a41da04e726ffd35da18d99cd2f46cb99467bf
Reviewed-on: http://codereview.qt.nokia.com/1094
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/valgrind/memchecktool.h

@@ -118,6 +118,7 @@ private:
 
     Analyzer::IAnalyzerEngine *createEngine(const Analyzer::AnalyzerStartParameters &sp,
                                ProjectExplorer::RunConfiguration *runConfiguration = 0);
+    void startTool(Analyzer::StartMode mode);
 
     void clearErrorView();