Devtools[LayoutEditor]: Rework layout-editor workflow

Source/core/inspector/InspectorHighlight.h

Index: Source/core/inspector/InspectorHighlight.h
diff --git a/Source/core/inspector/InspectorHighlight.h b/Source/core/inspector/InspectorHighlight.h
index 9550d7574f85a8fa0d8bc44cc2f856fa2f7abedb..2e83a6577089284ca9406734f3e8aacc354afdf8 100644
--- a/Source/core/inspector/InspectorHighlight.h
+++ b/Source/core/inspector/InspectorHighlight.h
@@ -21,6 +21,7 @@ struct CORE_EXPORT InspectorHighlightConfig {
     WTF_MAKE_FAST_ALLOCATED(InspectorHighlightConfig);
 public:
     InspectorHighlightConfig();
+    InspectorHighlightConfig(const InspectorHighlightConfig&);
 
     Color content;
     Color contentOutline;
@@ -34,7 +35,6 @@ public:
     bool showInfo;
     bool showRulers;
     bool showExtensionLines;
-    bool showLayoutEditor;
     bool displayAsMaterial;
 };