[DevTools] Remove layout editor experiment.

third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h

Index: third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h
diff --git a/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h b/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h
index 5784b7fdf8d29618515a65fda83d16f22db9d14c..fe54d8c8b6631e3a21c3d9b75b7734f4dfc53d99 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h
+++ b/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h
@@ -81,7 +81,6 @@ class CORE_EXPORT InspectorDOMAgent final
     NotSearching,
     SearchingForNormal,
     SearchingForUAShadow,
-    ShowLayoutEditor
   };
 
   class Client {
@@ -95,7 +94,6 @@ class CORE_EXPORT InspectorDOMAgent final
                                const InspectorHighlightConfig&) {}
     virtual void setInspectMode(SearchMode searchMode,
                                 std::unique_ptr<InspectorHighlightConfig>) {}
-    virtual void setInspectedNode(Node*) {}
   };
 
   static Response toResponse(ExceptionState&);