Detect change on the intersection of video and viewport.

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

Index: third_party/WebKit/Source/core/dom/IntersectionObservation.h
diff --git a/third_party/WebKit/Source/core/dom/IntersectionObservation.h b/third_party/WebKit/Source/core/dom/IntersectionObservation.h
index cd87187c0a122f10d54e3965ed67354daa40e01e..80d6fbf5b042f944664987bef031c736c12d0471 100644
--- a/third_party/WebKit/Source/core/dom/IntersectionObservation.h
+++ b/third_party/WebKit/Source/core/dom/IntersectionObservation.h
@@ -6,7 +6,6 @@
 #define IntersectionObservation_h
 
 #include "core/dom/DOMHighResTimeStamp.h"
-#include "platform/geometry/LayoutRect.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
@@ -21,15 +20,6 @@ class IntersectionObservation final
                           Element&,
                           bool shouldReportRootBounds);
 
-  struct IntersectionGeometry {
-    LayoutRect targetRect;
-    LayoutRect intersectionRect;
-    LayoutRect rootRect;
-    bool doesIntersect;
-
-    IntersectionGeometry() : doesIntersect(false) {}
-  };
-
   IntersectionObserver& observer() const { return *m_observer; }
   Element* target() const { return m_target; }
   unsigned lastThresholdIndex() const { return m_lastThresholdIndex; }
@@ -42,18 +32,7 @@ class IntersectionObservation final
   DECLARE_TRACE();
 
  private:
-  void applyRootMargin(LayoutRect&) const;
-  void initializeGeometry(IntersectionGeometry&) const;
-  void initializeTargetRect(LayoutRect&) const;
-  void initializeRootRect(LayoutRect&) const;
-  void clipToRoot(IntersectionGeometry&) const;
-  void mapTargetRectToTargetFrameCoordinates(LayoutRect&) const;
-  void mapRootRectToRootFrameCoordinates(LayoutRect&) const;
-  void mapRootRectToTargetFrameCoordinates(LayoutRect&) const;
-  bool computeGeometry(IntersectionGeometry&) const;
-
   Member<IntersectionObserver> m_observer;
-
   WeakMember<Element> m_target;
 
   unsigned m_shouldReportRootBounds : 1;