Hide Return Values section from old versions.

Author: hzr

src/build-application/build_ecmascript_debugger_6_0.js

@@ -84,11 +84,14 @@ window.app.builders.EcmascriptDebugger["6.0"] = function(service)
                         'scroll mono');
 
     /* Runtime State */
+    var js_side_panel_sections = service_interface.satisfies_version(6, 10)
+                               ? ['watches', 'return-values', 'callstack', 'inspection']
+                               : ['watches', 'callstack', 'inspection'];
     new cls.JSSidePanelView('scripts-side-panel',
                             ui_strings.M_VIEW_LABEL_RUNTIME_STATE,
-                            ['watches', 'return-values', 'callstack', 'inspection'],
+                            js_side_panel_sections,
                             // default expanded flags for the view list
-                            [false, true, true]);
+                            [false, true, true, true]);
 
     /* Return Values */
     cls.ReturnValuesView.prototype = ViewBase;