Replicate feature policy container policies.

third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp

Index: third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp b/third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp
index ca3bb0fb6accf5aba82e5ddc6a64babf9d522291..f43d2016dd4c08a3ac1d6e4eaf8f20a767d745d5 100644
--- a/third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp
@@ -163,6 +163,23 @@ void HTMLFrameElementBase::ParseAttribute(
   }
 }
 
+const RefPtr<SecurityOrigin> HTMLFrameElementBase::GetOriginForFeaturePolicy()
+    const {
+  KURL url = GetDocument().CompleteURL(url_);
+  // Sandboxed frames have a unique origin.
+  if (url.ProtocolIsData() || (GetSandboxFlags() & kSandboxOrigin))
+    return SecurityOrigin::CreateUnique();
+
+  // If the frame will inherit its origin from the owner, then use the owner's
+  // origin when constructing the container policy.
+  if (Document::ShouldInheritSecurityOriginFromOwner(url))
+    return GetDocument().GetSecurityOrigin();
+
+  // Other frames should use the origin defined by the absolute URL (this will
+  // be a unique origin for data: URLs)
+  return SecurityOrigin::Create(url);
+}
+
 void HTMLFrameElementBase::SetNameAndOpenURL() {
   frame_name_ = GetNameAttribute();
   OpenURL();