callTheAdoptionAgency should work asynchronously

Source/core/html/parser/HTMLConstructionSite.h

Index: Source/core/html/parser/HTMLConstructionSite.h
diff --git a/Source/core/html/parser/HTMLConstructionSite.h b/Source/core/html/parser/HTMLConstructionSite.h
index e541bd05591fd559ab21b87e380b9b2df4b56371..fb2e5e755f2346a98cf72e77f816c1c570373ed4 100644
--- a/Source/core/html/parser/HTMLConstructionSite.h
+++ b/Source/core/html/parser/HTMLConstructionSite.h
@@ -41,7 +41,9 @@ namespace WebCore {
 struct HTMLConstructionSiteTask {
     enum Operation {
         Insert,
+        InsertAlreadyParsedChild,
         Reparent,
+        TakeAllChildren,
     };
 
     explicit HTMLConstructionSiteTask(Operation op)
@@ -50,6 +52,14 @@ struct HTMLConstructionSiteTask {
     {
     }
 
+    ContainerNode* oldParent()
+    {
+        // It's sort of ugly, but we store the |oldParent| in the |child| field
+        // of the task so that we don't bloat the HTMLConstructionSiteTask
+        // object in the common case of the Insert operation.
+        return toContainerNode(child.get());
+    }
+
     Operation operation;
     RefPtr<ContainerNode> parent;
     RefPtr<Node> nextChild;
@@ -108,6 +118,12 @@ public:
     void insertHTMLBodyStartTagInBody(AtomicHTMLToken*);
 
     void reparent(HTMLElementStack::ElementRecord* newParent, HTMLElementStack::ElementRecord* child);
+    void reparent(HTMLElementStack::ElementRecord* newParent, HTMLStackItem* child);
+    // insertAlreadyParsedChild assumes that |child| has already been parsed (i.e., we're just
+    // moving it around in the tree rather than parsing it for the first time). That means
+    // this function doesn't call beginParsingChildren / finishParsingChildren.
+    void insertAlreadyParsedChild(HTMLStackItem* newParent, HTMLElementStack::ElementRecord* child);
+    void takeAllChildren(HTMLStackItem* newParent, HTMLElementStack::ElementRecord* oldParent);
 
     PassRefPtr<HTMLStackItem> createElementFromSavedToken(HTMLStackItem*);