Devtools[LayoutEditor]: Rework layout-editor workflow

Source/core/inspector/InspectorDOMAgent.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 68 matching lines @@
 public:
     struct CORE_EXPORT DOMListener : public WillBeGarbageCollectedMixin {
         virtual ~DOMListener()
         {
         }
         virtual void didRemoveDocument(Document*) = 0;
         virtual void didRemoveDOMNode(Node*) = 0;
         virtual void didModifyDOMAttr(Element*) = 0;
     };
 
-    enum SearchMode { NotSearching, SearchingForNormal, SearchingForUAShadow };
+    enum SearchMode { NotSearching, SearchingForNormal, SearchingForUAShadow, ShowLayoutEditor };
 
     class Client {
     public:
         virtual ~Client() { }
         virtual void hideHighlight() { }
         virtual void highlightNode(Node*, const InspectorHighlightConfig&, bool omitTooltip) { }
         virtual void highlightQuad(PassOwnPtr<FloatQuad>, const InspectorHighlightConfig&) { }
         virtual void setInspectMode(SearchMode searchMode, PassOwnPtr<InspectorHighlightConfig>) { }
     };
 
@@ skipping 163 matching lines @@
     OwnPtrWillBeMember<InspectorHistory> m_history;
     OwnPtrWillBeMember<DOMEditor> m_domEditor;
     bool m_suppressAttributeModifiedEvent;
     int m_backendNodeIdToInspect;
 };
 
 
 } // namespace blink
 
 #endif // !defined(InspectorDOMAgent_h)