Reland "Implement FullScreen using top layer."

third_party/WebKit/Source/core/dom/Fullscreen.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) 2013 Google Inc. All rights reserved.
  *
@@ skipping 23 matching lines @@
 #include "core/dom/Element.h"
 #include "platform/Supplementable.h"
 #include "platform/Timer.h"
 #include "platform/geometry/LayoutRect.h"
 #include "wtf/Deque.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
-class LayoutFullScreen;
 class ComputedStyle;
 
 class CORE_EXPORT Fullscreen final
     : public GarbageCollectedFinalized<Fullscreen>
     , public Supplement<Document>
     , public ContextLifecycleObserver {
     USING_GARBAGE_COLLECTED_MIXIN(Fullscreen);
 public:
     virtual ~Fullscreen();
     static const char* supplementName();
@@ skipping 19 matching lines @@
 
     static void fullyExitFullscreen(Document&);
     void exitFullscreen();
 
     static bool fullscreenEnabled(Document&);
     Element* fullscreenElement() const { return !m_fullScreenElementStack.isEmpty() ? m_fullScreenElementStack.last().first.get() : 0; }
 
     void didEnterFullscreenForElement(Element*);
     void didExitFullscreen();
 
-    void setFullScreenLayoutObject(LayoutFullScreen*);
-    LayoutFullScreen* fullScreenLayoutObject() const { return m_fullScreenLayoutObject; }
-    void fullScreenLayoutObjectDestroyed();
+    void didUpdateSize(Element&);
 
     void elementRemoved(Element&);
 
     // Returns true if the current fullscreen element stack corresponds to a
     // container for an actual fullscreen element in a descendant
     // out-of-process iframe.
     bool forCrossProcessDescendant() { return m_forCrossProcessDescendant; }
 
     // Mozilla API
     Element* webkitCurrentFullScreenElement() const { return m_fullScreenElement.get(); }
 
     // ContextLifecycleObserver:
     void contextDestroyed() override;
 
     DECLARE_VIRTUAL_TRACE();
 
+    using ElementStack = HeapVector<std::pair<Member<Element>, RequestType>>;
+    const ElementStack& fullScreenElementStack() const { return m_fullScreenElementStack; }
+
 private:
     static Fullscreen* fromIfExistsSlow(Document&);
 
     explicit Fullscreen(Document&);
 
     Document* document();
 
     void clearFullscreenElementStack();
     void popFullscreenElementStack();
     void pushFullscreenElementStack(Element&, RequestType);
 
     void enqueueChangeEvent(Document&, RequestType);
     void enqueueErrorEvent(Element&, RequestType);
     void eventQueueTimerFired(Timer<Fullscreen>*);
 
     Member<Element> m_fullScreenElement;
     HeapVector<std::pair<Member<Element>, RequestType>> m_fullScreenElementStack;
-    LayoutFullScreen* m_fullScreenLayoutObject;
     Timer<Fullscreen> m_eventQueueTimer;
     HeapDeque<Member<Event>> m_eventQueue;
     LayoutRect m_savedPlaceholderFrameRect;
     RefPtr<ComputedStyle> m_savedPlaceholderComputedStyle;
 
     // TODO(alexmos, dcheng): Currently, this assumes that if fullscreen was
     // entered for an element in an out-of-process iframe, then it's not
     // possible to re-enter fullscreen for a different element in this
     // document, since that requires a user gesture, which can't be obtained
     // since nothing in this document is visible, and since user gestures can't
@@ skipping 15 matching lines @@
 inline Fullscreen* Fullscreen::fromIfExists(Document& document)
 {
     if (!document.hasFullscreenSupplement())
         return 0;
     return fromIfExistsSlow(document);
 }
 
 } // namespace blink
 
 #endif // Fullscreen_h