Move container policy logic to frame owner classes.

third_party/WebKit/Source/core/html/HTMLIFrameElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2004, 2006, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 29 matching lines @@
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(HTMLIFrameElement);
 
  public:
   DECLARE_NODE_FACTORY(HTMLIFrameElement);
   DECLARE_VIRTUAL_TRACE();
   ~HTMLIFrameElement() override;
   DOMTokenList* sandbox() const;
   DOMTokenList* allow() const;
 
+  Vector<WebParsedFeaturePolicyDeclaration> ConstructContainerPolicy()
+      const override;
+
  private:
   explicit HTMLIFrameElement(Document&);
 
   void SetCollapsed(bool) override;
 
   void ParseAttribute(const AttributeModificationParams&) override;
   bool IsPresentationAttribute(const QualifiedName&) const override;
   void CollectStyleForPresentationAttribute(const QualifiedName&,
                                             const AtomicString&,
                                             MutableStylePropertySet*) override;
@@ skipping 32 matching lines @@
   Member<HTMLIFrameElementAllow> allow_;
 
   WebVector<WebFeaturePolicyFeature> allowed_features_;
 
   ReferrerPolicy referrer_policy_;
 };
 
 }  // namespace blink
 
 #endif  // HTMLIFrameElement_h