Devtools[LayoutEditor]: Rework layout-editor workflow

Source/core/inspector/LayoutEditor.h

Index: Source/core/inspector/LayoutEditor.h
diff --git a/Source/core/inspector/LayoutEditor.h b/Source/core/inspector/LayoutEditor.h
index f23d850ed13472d4598941341a59acecc28f73cd..a549992460355bce5dea9fadebc0fbc3cdb757be 100644
--- a/Source/core/inspector/LayoutEditor.h
+++ b/Source/core/inspector/LayoutEditor.h
@@ -8,7 +8,7 @@
 #include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
 #include "core/css/CSSPrimitiveValue.h"
-#include "core/dom/Node.h"
+#include "core/dom/Element.h"
 #include "platform/heap/Handle.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefPtr.h"
@@ -18,36 +18,41 @@ namespace blink {
 
 class CSSPrimitiveValue;
 class InspectorCSSAgent;
+class InspectorDOMAgent;
 class JSONArray;
 class JSONObject;
 
 class CORE_EXPORT LayoutEditor final : public NoBaseWillBeGarbageCollectedFinalized<LayoutEditor> {
 public:
-    static PassOwnPtrWillBeRawPtr<LayoutEditor> create(InspectorCSSAgent* cssAgent)
+    static PassOwnPtrWillBeRawPtr<LayoutEditor> create(InspectorCSSAgent* cssAgent, InspectorDOMAgent* domAgent)
     {
-        return adoptPtrWillBeNoop(new LayoutEditor(cssAgent));
+        return adoptPtrWillBeNoop(new LayoutEditor(cssAgent, domAgent));
     }
 
-    void setNode(Node*);
+    void selectNode(Node*);
+    Node* node() { return m_element.get(); }
     PassRefPtr<JSONObject> buildJSONInfo() const;
     void overlayStartedPropertyChange(const String&);
     void overlayPropertyChanged(float);
     void overlayEndedPropertyChange();
+    void clearSelection(bool);
 
     DECLARE_TRACE();
 
 private:
-    explicit LayoutEditor(InspectorCSSAgent*);
+    LayoutEditor(InspectorCSSAgent*, InspectorDOMAgent*);
     RefPtrWillBeRawPtr<CSSPrimitiveValue> getPropertyCSSValue(CSSPropertyID) const;
     PassRefPtr<JSONObject> createValueDescription(const String&) const;
     void appendAnchorFor(JSONArray*, const String&, const String&, const FloatPoint&, const FloatPoint&) const;
 
     RefPtrWillBeMember<Element> m_element;
     RawPtrWillBeMember<InspectorCSSAgent> m_cssAgent;
+    RawPtrWillBeMember<InspectorDOMAgent> m_domAgent;
     CSSPropertyID m_changingProperty;
     float m_propertyInitialValue;
     float m_factor;
     CSSPrimitiveValue::UnitType m_valueUnitType;
+    bool m_isDirty;
 };
 
 } // namespace blink