Oilpan: Schedule a precise GC when a page navigates

Source/core/dom/Element.h

Index: Source/core/dom/Element.h
diff --git a/Source/core/dom/Element.h b/Source/core/dom/Element.h
index 4c1dfb9c982316e552c490dd13247286aaa8e48a..28e3a5e994c27d26e80ab1560462245b5365f481 100644
--- a/Source/core/dom/Element.h
+++ b/Source/core/dom/Element.h
@@ -804,6 +804,8 @@ inline Node::InsertionNotificationRequest Node::insertedInto(ContainerNode* inse
         setFlag(IsInShadowTreeFlag);
     if (childNeedsDistributionRecalc() && !insertionPoint->childNeedsDistributionRecalc())
         insertionPoint->markAncestorsWithChildNeedsDistributionRecalc();
+    if (insertionPoint->inDocument())
+        insertionPoint->document().topDocument().incrementNodeCount();
     return InsertionDone;
 }
 
@@ -816,6 +818,8 @@ inline void Node::removedFrom(ContainerNode* insertionPoint)
         clearFlag(IsInShadowTreeFlag);
     if (AXObjectCache* cache = document().existingAXObjectCache())
         cache->remove(this);
+    if (insertionPoint->inDocument())
+        insertionPoint->document().topDocument().decrementNodeCount();
 }
 
 inline void Element::invalidateStyleAttribute()