Utils: add FilePath::baseName

Removing some FilePath::toFileInfo() calls

Change-Id: I49be2ef260f225e07b64ee8ace6a8cd47a9d8bb2
Reviewed-by: hjk <hjk@qt.io>

src/plugins/compilationdatabaseprojectmanager/compilationdbparser.cpp

@@ -194,7 +194,7 @@ std::vector<DbEntry> CompilationDbParser::readJsonObjects() const
         const QJsonObject object = document.object();
         const Utils::FilePath fileName = jsonObjectFilename(object);
         const QStringList flags = filterFromFileName(jsonObjectFlags(object, flagsCache),
-                                                     fileName.toFileInfo().baseName());
+                                                     fileName.baseName());
         result.push_back({flags, fileName, object["directory"].toString()});
 
         objectStart = m_projectFileContents.indexOf('{', objectEnd + 1);