Rename IDocument::fileName --> filePath

That is what it actually is, wrt how Qt API calls it.

Change-Id: Ied02055debf6aad75556b0d9d22e8ba2f72be555
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/classview/classviewmanager.cpp

@@ -465,7 +465,7 @@ void Manager::gotoLocations(const QList<QVariant> &list)
     if (Core::IEditor *editor = Core::EditorManager::currentEditor()) {
         // get current file name
         if (Core::IDocument *document = editor->document())
-            fileName = document->fileName();
+            fileName = document->filePath();
 
         // if text file - what is current position?
         TextEditor::ITextEditor *textEditor = qobject_cast<TextEditor::ITextEditor *>(editor);