Document user gesture state should be able to propagate over postMessage

third_party/WebKit/Source/platform/UserGestureIndicator.h

 /*
  * Copyright (C) 2010 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 42 matching lines @@
 // for later (see, e.g., DOMTimer, which propagates user gestures to the timer
 // fire in certain situations). Passing it to a UserGestureIndicator will cause
 // it to be considered as currently being processed.
 class PLATFORM_EXPORT UserGestureToken : public RefCounted<UserGestureToken> {
   WTF_MAKE_NONCOPYABLE(UserGestureToken);
 
  public:
   enum Status { NewGesture, PossiblyExistingGesture };
   enum TimeoutPolicy { Default, OutOfProcess, HasPaused };
 
-  virtual ~UserGestureToken() {}
+  ~UserGestureToken() {}
   bool hasGestures() const;
   void transferGestureTo(UserGestureToken*);
   bool consumeGesture();
   void setTimeoutPolicy(TimeoutPolicy);
 
   // If this UserGestureToken is wrapped in a UserGestureIndicator, and the
   // UserGestureIndicator is the lowest on the callstack (and therefore this
   // UserGestureToken is UserGestureIndicator::s_rootToken), then the callback
   // provided here will be called when this UserGestureToken is utilized.
   // Calling setUserGestureUtilizedCallback() on a UserGestureToken that is not
@@ skipping 44 matching lines @@
 
  private:
   static UserGestureToken* s_rootToken;
 
   RefPtr<UserGestureToken> m_token;
 };
 
 }  // namespace blink
 
 #endif