Add "registerable domain" support to OriginAccessEntry.

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index d85fa40c092391c457b3c51c2864d547ea6f4d7e..dac2d77c5e779258c5697e8140f6ce810d173991 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -3989,7 +3989,7 @@ const KURL& Document::firstPartyForCookies() const
     // We're intentionally using the URL of each document rather than the document's SecurityOrigin.
     // Sandboxing a document into a unique origin shouldn't effect first-/third-party status for
     // cookies and site data.
-    OriginAccessEntry accessEntry(topDocument().url().protocol(), topDocument().url().host(), OriginAccessEntry::AllowSubdomains);
+    OriginAccessEntry accessEntry(topDocument().url().protocol(), topDocument().url().host(), OriginAccessEntry::AllowRegisterableDomains);
     const Document* currentDocument = this;
     while (currentDocument) {
         // Skip over srcdoc documents, as they are always same-origin with their closest non-srcdoc parent.