Fire visibilitychange event on unload (behind the flag)

third_party/WebKit/Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 466 matching lines @@
     // This is the DOM API document.close()
     void close(ExceptionState&);
     // This is used internally and does not handle exceptions.
     void close();
     // implicitClose() actually does the work of closing the input stream.
     void implicitClose();
 
     bool dispatchBeforeUnloadEvent(ChromeClient&, bool isReload, bool& didAllowNavigation);
     void dispatchUnloadEvents();
 
+    // This enum must be kept consistent with kDismissals in
+    // ChromeClientImpl::shouldOpenModalDialogDuringPageDismissal.
     enum PageDismissalType {
-        NoDismissal = 0,
-        BeforeUnloadDismissal = 1,
-        PageHideDismissal = 2,
-        UnloadDismissal = 3
+        NoDismissal,
+        BeforeUnloadDismissal,
+        PageHideDismissal,
+        UnloadVisibilityChangeDismissal,
+        UnloadDismissal
     };
     PageDismissalType pageDismissalEventBeingDispatched() const;
 
     void cancelParsing();
 
     void write(const SegmentedString& text, Document* enteredDocument = nullptr, ExceptionState& = ASSERT_NO_EXCEPTION);
     void write(const String& text, Document* enteredDocument = nullptr, ExceptionState& = ASSERT_NO_EXCEPTION);
     void writeln(const String& text, Document* enteredDocument = nullptr, ExceptionState& = ASSERT_NO_EXCEPTION);
     void write(LocalDOMWindow*, const Vector<String>& text, ExceptionState&);
     void writeln(LocalDOMWindow*, const Vector<String>& text, ExceptionState&);
@@ skipping 365 matching lines @@
 
     void statePopped(PassRefPtr<SerializedScriptValue>);
 
     enum LoadEventProgress {
         LoadEventNotRun,
         LoadEventInProgress,
         LoadEventCompleted,
         BeforeUnloadEventInProgress,
         BeforeUnloadEventCompleted,
         PageHideInProgress,
+        UnloadVisibilityChangeInProgress,
         UnloadEventInProgress,
         UnloadEventHandled
     };
     bool loadEventStillNeeded() const { return m_loadEventProgress == LoadEventNotRun; }
     bool processingLoadEvent() const { return m_loadEventProgress == LoadEventInProgress; }
     bool loadEventFinished() const { return m_loadEventProgress >= LoadEventCompleted; }
     bool unloadStarted() const { return m_loadEventProgress >= PageHideInProgress; }
     bool processingBeforeUnload() const { return m_loadEventProgress == BeforeUnloadEventInProgress; }
     void suppressLoadEvent();
 
@@ skipping 562 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif // Document_h