Replicate feature policy container policies.

third_party/WebKit/Source/core/frame/FrameOwner.h

Index: third_party/WebKit/Source/core/frame/FrameOwner.h
diff --git a/third_party/WebKit/Source/core/frame/FrameOwner.h b/third_party/WebKit/Source/core/frame/FrameOwner.h
index 103c02a2a080edaeee31627f0237898f914d7f75..bbf42779716e8056deb70cad41cebfb4084786b7 100644
--- a/third_party/WebKit/Source/core/frame/FrameOwner.h
+++ b/third_party/WebKit/Source/core/frame/FrameOwner.h
@@ -51,6 +51,7 @@ class CORE_EXPORT FrameOwner : public GarbageCollectedMixin {
   virtual bool isDisplayNone() const = 0;
   virtual AtomicString csp() const = 0;
   virtual const WebVector<WebFeaturePolicyFeature>& allowedFeatures() const = 0;
+  virtual const WebParsedFeaturePolicy& containerPolicy() const = 0;
 };
 
 // TODO(dcheng): This class is an internal implementation detail of provisional
@@ -88,6 +89,10 @@ class CORE_EXPORT DummyFrameOwner
     DEFINE_STATIC_LOCAL(WebVector<WebFeaturePolicyFeature>, features, ());
     return features;
   }
+  const WebParsedFeaturePolicy& containerPolicy() const override {
+    DEFINE_STATIC_LOCAL(WebParsedFeaturePolicy, containerPolicy, ());
+    return containerPolicy;
+  }
 
  private:
   // Intentionally private to prevent redundant checks when the type is