Clang: Cancel query progress bar

Change-Id: I1b8a4ec052a548e5ed09f39c3f0d3c87b13a6bd4
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/clangrefactoring/qtcreatorsearchhandle.cpp

@@ -55,6 +55,12 @@ void QtCreatorSearchHandle::setResultCounter(uint counter)
     promise.setProgressValue(counter);
 }
 
+void QtCreatorSearchHandle::cancel()
+{
+    SearchHandle::cancel();
+    promise.reportCanceled();
+}
+
 void QtCreatorSearchHandle::finishSearch()
 {
     searchResult->finishSearch(false);

src/plugins/clangrefactoring/qtcreatorsearchhandle.h

@@ -45,6 +45,8 @@ public:
     void setExpectedResultCount(uint count) override;
     void setResultCounter(uint counter) override;
 
+    void cancel() override;
+
     void finishSearch() override;
 
 private:

src/plugins/clangrefactoring/searchhandle.h

@@ -45,7 +45,7 @@ public:
 
     virtual void finishSearch() = 0;
 
-    void cancel();
+    virtual void cancel();
 
     void setRefactoringServer(ClangBackEnd::RefactoringServerInterface *server);