Move persistent gesture state to Document, add DocumentUserGestureToken

third_party/WebKit/public/web/WebScopedUserGesture.h

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 #ifndef WebScopedUserGesture_h
 #define WebScopedUserGesture_h
 
 #include "public/platform/WebCommon.h"
 #include <memory>
 
 namespace blink {
 
 class UserGestureIndicator;
+class WebLocalFrame;
 class WebUserGestureToken;
 
 // An instance of this class, while kept alive, will indicate that we are in
 // the context of a known user gesture. To use, create one, perform whatever
 // actions were done under color of a known user gesture, and then delete it.
 // Usually this will be done on the stack.
 //
 // SECURITY WARNING: Do not create several instances of this class for the same
 // user gesture. Doing so might enable malicious code to work around certain
 // restrictions such as opening multiple windows.
 // Instead, obtain the current WebUserGestureToken from the
 // WebUserGestureIndicator, and use this token to create a
 // WebScopedUserGesture. If the token was alrady consumed, the new
 // WebScopedUserGesture will not indicate that we are in the context of a user
 // gesture.
 class WebScopedUserGesture {
  public:
   BLINK_EXPORT explicit WebScopedUserGesture(const WebUserGestureToken& token);
-  BLINK_EXPORT WebScopedUserGesture();
+  BLINK_EXPORT WebScopedUserGesture(WebLocalFrame*);
   BLINK_EXPORT ~WebScopedUserGesture();
 
  private:
   std::unique_ptr<UserGestureIndicator> m_indicator;
 };
 
 }  // namespace blink
 
 #endif  // WebScopedUserGesture_h