IntersectionObserver: second cut.

third_party/WebKit/Source/core/dom/ElementRareData.cpp

Index: third_party/WebKit/Source/core/dom/ElementRareData.cpp
diff --git a/third_party/WebKit/Source/core/dom/ElementRareData.cpp b/third_party/WebKit/Source/core/dom/ElementRareData.cpp
index edd8ba49ea8b1c9ec448c0b24d0993b3ef4cbc1e..0aae95a509824d61ef1658001519eec14199ef15 100644
--- a/third_party/WebKit/Source/core/dom/ElementRareData.cpp
+++ b/third_party/WebKit/Source/core/dom/ElementRareData.cpp
@@ -30,7 +30,7 @@
 
 #include "config.h"
 #include "core/dom/ElementRareData.h"
-
+#include "core/dom/IntersectionObservation.h"
 #include "core/style/ComputedStyle.h"
 
 namespace blink {
@@ -40,8 +40,8 @@ struct SameSizeAsElementRareData : NodeRareData {
     LayoutSize sizeForResizing;
     IntSize scrollOffset;
     void* pointer;
-    RawPtrWillBeMember<void*> willbeMember[11];
-    PersistentWillBeMember<void*> persistent[1];
+    RawPtrWillBeMember<void*> willbeMember[12];
+    PersistentWillBeMember<void*> persistent[2];
 };
 
 CSSStyleDeclaration& ElementRareData::ensureInlineCSSStyleDeclaration(Element* ownerElement)
@@ -69,6 +69,8 @@ DEFINE_TRACE_AFTER_DISPATCH(ElementRareData)
 #endif
     visitor->trace(m_elementAnimations);
     visitor->trace(m_cssomWrapper);
+    visitor->trace(m_intersectionObservations);
+    visitor->trace(m_weakPointerFactory);
     visitor->trace(m_customElementDefinition);
     visitor->trace(m_generatedBefore);
     visitor->trace(m_generatedAfter);