Intersection Observer support for OOPIF

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IntersectionObserver_h
 #define IntersectionObserver_h
 
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/IntersectionObservation.h"
@@ skipping 62 matching lines @@
   void enqueueIntersectionObserverEntry(IntersectionObserverEntry&);
   void applyRootMargin(LayoutRect&) const;
   unsigned firstThresholdGreaterThan(float ratio) const;
   void deliver();
   void removeObservation(IntersectionObservation&);
   bool hasEntries() const { return m_entries.size(); }
   const HeapLinkedHashSet<WeakMember<IntersectionObservation>>& observations()
       const {
     return m_observations;
   }
+  void intersectWithRemoteAncestorsIfNeeded(LayoutRect&);
 
   // Set the assumed initial state of the observed element. Note that this can
   // only be set before calling observe().
   // TODO(skyostil): Move this setting to IntersectionObserverInit once the API
   // is finalized.
   void setInitialState(InitialState);
 
   DECLARE_TRACE();
 
  private:
   explicit IntersectionObserver(IntersectionObserverCallback&,
                                 Node&,
                                 const Vector<Length>& rootMargin,
-                                const Vector<float>& thresholds);
+                                const Vector<float>& thresholds,
+                                bool intersectWithRemoteAncestors);
   void clearWeakMembers(Visitor*);
 
   Member<IntersectionObserverCallback> m_callback;
   WeakMember<Node> m_root;
   HeapLinkedHashSet<WeakMember<IntersectionObservation>> m_observations;
   HeapVector<Member<IntersectionObserverEntry>> m_entries;
   Vector<float> m_thresholds;
   Length m_topMargin;
   Length m_rightMargin;
   Length m_bottomMargin;
   Length m_leftMargin;
   InitialState m_initialState;
+  bool m_intersectWithRemoteAncestors;
 };
 
 }  // namespace blink
 
 #endif  // IntersectionObserver_h