Implement FullScreen using top layer.

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

Index: third_party/WebKit/Source/core/dom/Fullscreen.h
diff --git a/third_party/WebKit/Source/core/dom/Fullscreen.h b/third_party/WebKit/Source/core/dom/Fullscreen.h
index 8e8a8639599dcab5fb172f6a40c6c99a23332d2b..f03664563e205ee72466e4016deef3c0155ffda1 100644
--- a/third_party/WebKit/Source/core/dom/Fullscreen.h
+++ b/third_party/WebKit/Source/core/dom/Fullscreen.h
@@ -41,7 +41,6 @@
 
 namespace blink {
 
-class LayoutFullScreen;
 class ComputedStyle;
 
 class CORE_EXPORT Fullscreen final
@@ -78,9 +77,7 @@ public:
     void didEnterFullScreenForElement(Element*);
     void didExitFullScreenForElement(Element*);
 
-    void setFullScreenLayoutObject(LayoutFullScreen*);
-    LayoutFullScreen* fullScreenLayoutObject() const { return m_fullScreenLayoutObject; }
-    void fullScreenLayoutObjectDestroyed();
+    void didUpdateSize(Element&);
 
     void elementRemoved(Element&);
 
@@ -94,6 +91,8 @@ public:
 
     DECLARE_VIRTUAL_TRACE();
 
+    const WillBeHeapVector<std::pair<RefPtrWillBeMember<Element>, RequestType>>& fullScreenElementStack() const { return m_fullScreenElementStack; }

[esprehn, 2015/10/09 10:34:00]

You might do something like:

using ElementStack = WillBeHeapVector<std::pair<RefPtrWillBeMember<Element>,
RequestType>>;

and then make this return ElementStack& and the member be

ElementStack m_fullScreenElementStack

[dsinclair, 2015/10/13 15:50:43]

Done.

+
 private:
     static Fullscreen* fromIfExistsSlow(Document&);
 
@@ -111,7 +110,6 @@ private:
 
     RefPtrWillBeMember<Element> m_fullScreenElement;
     WillBeHeapVector<std::pair<RefPtrWillBeMember<Element>, RequestType>> m_fullScreenElementStack;
-    LayoutFullScreen* m_fullScreenLayoutObject;
     Timer<Fullscreen> m_eventQueueTimer;
     WillBeHeapDeque<RefPtrWillBeMember<Event>> m_eventQueue;
     LayoutRect m_savedPlaceholderFrameRect;