Move container policy logic to frame owner classes.

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

Index: third_party/WebKit/Source/core/html/HTMLFrameElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLFrameElement.h b/third_party/WebKit/Source/core/html/HTMLFrameElement.h
index 94f4b854d44341aca16a0e5a0bd8993de5dd9a6c..09f44c437c297361f7bc2029b252379b83a4fe76 100644
--- a/third_party/WebKit/Source/core/html/HTMLFrameElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLFrameElement.h
@@ -24,11 +24,12 @@
 #ifndef HTMLFrameElement_h
 #define HTMLFrameElement_h
 
+#include "core/CoreExport.h"
 #include "core/html/HTMLFrameElementBase.h"
 
 namespace blink {
 
-class HTMLFrameElement final : public HTMLFrameElementBase {
+class CORE_EXPORT HTMLFrameElement final : public HTMLFrameElementBase {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
@@ -38,6 +39,9 @@ class HTMLFrameElement final : public HTMLFrameElementBase {
 
   bool NoResize() const;
 
+  Vector<WebParsedFeaturePolicyDeclaration> ConstructContainerPolicy()
+      const override;
+
  private:
   explicit HTMLFrameElement(Document&);