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 9ca4b77574b15103d87b460053cd0dc5f82fa09c..7a0309b635cf18eedef194ea4e50ae3871d2caf6 100644
--- a/third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp
@@ -164,6 +164,22 @@ void HTMLFrameElementBase::ParseAttribute(
   }
 }
 
+RefPtr<SecurityOrigin> HTMLFrameElementBase::GetOriginForFeaturePolicy() const {
+  // Sandboxed frames have a unique origin.
+  if (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.
+  KURL url = GetDocument().CompleteURL(url_);
+  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();