[DevTools] Remove InspectorOverlayHost::LayoutEditorListener.

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 15 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "core/inspector/InspectorOverlayHost.h"
 
 namespace blink {
 
 InspectorOverlayHost::InspectorOverlayHost()
-    : m_debuggerListener(nullptr)
-    , m_layoutEditorListener(nullptr)
+    : m_listener(nullptr)
 {
 }
 
 InspectorOverlayHost::~InspectorOverlayHost()
 {
 }
 
 void InspectorOverlayHost::resume()
 {
-    if (m_debuggerListener)
-        m_debuggerListener->overlayResumed();
+    if (m_listener)
+        m_listener->overlayResumed();
 }
 
 void InspectorOverlayHost::stepOver()
 {
-    if (m_debuggerListener)
-        m_debuggerListener->overlaySteppedOver();
+    if (m_listener)
+        m_listener->overlaySteppedOver();
 }
 
 void InspectorOverlayHost::startPropertyChange(const String& anchorName)
 {
-    if (m_layoutEditorListener)
-        m_layoutEditorListener->overlayStartedPropertyChange(anchorName);
+    if (m_listener)
+        m_listener->overlayStartedPropertyChange(anchorName);
 }
 
 void InspectorOverlayHost::changeProperty(float delta)
 {
-    if (m_layoutEditorListener)
-        m_layoutEditorListener->overlayPropertyChanged(delta);
+    if (m_listener)
+        m_listener->overlayPropertyChanged(delta);
 }
 
 void InspectorOverlayHost::endPropertyChange()
 {
-    if (m_layoutEditorListener)
-        m_layoutEditorListener->overlayEndedPropertyChange();
+    if (m_listener)
+        m_listener->overlayEndedPropertyChange();
 }
 
 DEFINE_TRACE(InspectorOverlayHost)
 {
-    visitor->trace(m_debuggerListener);
-    visitor->trace(m_layoutEditorListener);
+    visitor->trace(m_listener);
 }
 
 } // namespace blink