Devtools: Margin resizer in overlay experiment

Source/core/inspector/InspectorOverlayHost.h

 /*
  * 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 30 matching lines @@
 public:
     static PassRefPtrWillBeRawPtr<InspectorOverlayHost> create()
     {
         return adoptRefWillBeNoop(new InspectorOverlayHost());
     }
     ~InspectorOverlayHost();
     DECLARE_TRACE();
 
     void resume();
     void stepOver();
+    void updateCSSProperty(long newValue);
 
     class Listener : public WillBeGarbageCollectedMixin {
     public:
         virtual ~Listener() { }
         virtual void overlayResumed() = 0;
         virtual void overlaySteppedOver() = 0;
     };
     void setListener(Listener* listener) { m_listener = listener; }
 
+    class CSSListener : public WillBeGarbageCollectedMixin {
+    public:
+        virtual ~CSSListener() { }
+        virtual void updateCSSProperty(long newValue) = 0;
+    };
+    void setCSSListener(CSSListener* listener) { m_cssListener = listener; }
+
+
 private:
     InspectorOverlayHost();
 
     RawPtrWillBeMember<Listener> m_listener;
+    RawPtrWillBeMember<CSSListener> m_cssListener;
 };
 
 } // namespace blink
 
 #endif // InspectorOverlayHost_h