Apply PSL to "first-party for cookies" ancestor restrictions.

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 3991 matching lines @@
 }
 
 const KURL& Document::firstPartyForCookies() const
 {
     if (!RuntimeEnabledFeatures::firstPartyIncludesAncestorsEnabled())
         return topDocument().url();
 
     // 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.
-    RefPtr<SecurityOrigin> topOrigin = SecurityOrigin::create(topDocument().url());
+    OriginAccessEntry accessEntry(topDocument().url().protocol(), topDocument().url().host(), OriginAccessEntry::AllowSubdomains, OriginAccessEntry::TreatIPAddressAsIPAddress);
     const Document* currentDocument = this;
     while (currentDocument) {
         // Skip over srcdoc documents, as they are always same-origin with their closest non-srcdoc parent.
         while (currentDocument->isSrcdocDocument())
             currentDocument = currentDocument->parentDocument();
         ASSERT(currentDocument);
 
-        if (!topOrigin->canRequest(currentDocument->url()))
+        if (accessEntry.matchesOrigin(*currentDocument->securityOrigin()) == OriginAccessEntry::DoesNotMatchOrigin)
             return SecurityOrigin::urlWithUniqueSecurityOrigin();
 
         currentDocument = currentDocument->parentDocument();
     }
 
     return topDocument().url();
 }
 
 static bool isValidNameNonASCII(const LChar* characters, unsigned length)
 {
@@ skipping 1746 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif