CppEditor: Hide CppFileSettingsPage class in .cpp

Change-Id: Ic095d7d45681a1970fb8362667f50d632ee6d3e5
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/cppeditor/cppeditorplugin.cpp

@@ -180,7 +180,6 @@ public:
 
     CppModelManager modelManager;
     CppToolsSettings settings;
-    CppFileSettingsPage m_cppFileSettingsPage;
     CppCodeModelSettingsPage m_cppCodeModelSettingsPage;
     CppCodeStyleSettingsPage m_cppCodeStyleSettingsPage;
     CppProjectUpdaterFactory m_cppProjectUpdaterFactory;

src/plugins/cppeditor/cppfilesettingspage.cpp

@@ -452,13 +452,17 @@ void CppFileSettingsWidget::slotEdit()
 
 // CppFileSettingsPage
 
-CppFileSettingsPage::CppFileSettingsPage()
+class CppFileSettingsPage final : public Core::IOptionsPage
 {
+public:
+    CppFileSettingsPage()
+    {
         setId(Constants::CPP_FILE_SETTINGS_ID);
         setDisplayName(Tr::tr("File Naming"));
         setCategory(Constants::CPP_SETTINGS_CATEGORY);
         setWidgetCreator([] { return new CppFileSettingsWidget(&globalCppFileSettings()); });
-}
+    }
+};
 
 CppFileSettingsForProject::CppFileSettingsForProject(ProjectExplorer::Project *project)
     : m_project(project)
@@ -606,6 +610,8 @@ void setupCppFileSettings()
 {
     static CppFileSettingsProjectPanelFactory theCppFileSettingsProjectPanelFactory;
 
+    static CppFileSettingsPage theCppFileSettingsPage;
+
     globalCppFileSettings().fromSettings(Core::ICore::settings());
     globalCppFileSettings().addMimeInitializer();
 }

src/plugins/cppeditor/cppfilesettingspage.h

@@ -67,12 +67,6 @@ private:
     bool m_useGlobalSettings = true;
 };
 
-class CppFileSettingsPage : public Core::IOptionsPage
-{
-public:
-    CppFileSettingsPage();
-};
-
 CppFileSettings &globalCppFileSettings();
 
 void setupCppFileSettings();