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

Source/core/inspector/InspectorOverlayHost.cpp

 /*
  * Copyright (C) 2013 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.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 35 matching lines @@
     if (m_listener)
         m_listener->overlayResumed();
 }
 
 void InspectorOverlayHost::stepOver()
 {
     if (m_listener)
         m_listener->overlaySteppedOver();
 }
 
+void InspectorOverlayHost::startPropertyChange(const String& anchorName)
+{
+    if (m_layoutEditorListener)
+        m_layoutEditorListener->overlayStartedPropertyChange(anchorName);
+}
+
+void InspectorOverlayHost::changeProperty(float delta)
+{
+    if (m_layoutEditorListener)
+        m_layoutEditorListener->overlayPropertyChanged(delta);
+}
+
+void InspectorOverlayHost::endPropertyChange()
+{
+    if (m_layoutEditorListener)
+        m_layoutEditorListener->overlayEndedPropertyChange();
+}
+
 DEFINE_TRACE(InspectorOverlayHost)
 {
     visitor->trace(m_listener);
+    visitor->trace(m_layoutEditorListener);
 }
 
 } // namespace blink