Devtools[LayoutEditor]: Pass data about property change from InspectorOverlayPage

Source/core/inspector/InspectorOverlay.h

Index: Source/core/inspector/InspectorOverlay.h
diff --git a/Source/core/inspector/InspectorOverlay.h b/Source/core/inspector/InspectorOverlay.h
index bbb18a2e858f084ae7cbba54eeff7739ca052a2a..a72dc0a944beebef19595eab14c3af2eb77c9143 100644
--- a/Source/core/inspector/InspectorOverlay.h
+++ b/Source/core/inspector/InspectorOverlay.h
@@ -31,6 +31,7 @@
 
 #include "core/CoreExport.h"
 #include "core/inspector/InspectorHighlight.h"
+#include "core/inspector/LayoutEditor.h"
 #include "platform/geometry/FloatQuad.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
@@ -53,6 +54,7 @@ public:
     virtual void suspendUpdates() = 0;
     virtual void resumeUpdates() = 0;
     virtual void clear() = 0;
+    virtual LayoutEditor* layoutEditor() = 0;
 
     DEFINE_INLINE_VIRTUAL_TRACE() { }