TEST ONLY: Duplicate FP rather than modifying in place

content/common/feature_policy/feature_policy.h

Index: content/common/feature_policy/feature_policy.h
diff --git a/content/common/feature_policy/feature_policy.h b/content/common/feature_policy/feature_policy.h
index 45dd5ef8dc3111f5a9bb6f2991da3435244661ea..86a4103c4ed1159d9cb023b6d5f92c13ce6e9a0d 100644
--- a/content/common/feature_policy/feature_policy.h
+++ b/content/common/feature_policy/feature_policy.h
@@ -112,6 +112,7 @@ class CONTENT_EXPORT FeaturePolicy : public blink::WebFeaturePolicy {
   class Whitelist final {
    public:
     Whitelist();
+    Whitelist(const Whitelist& rhs);
     ~Whitelist();
 
     // Adds a single origin to the whitelist.
@@ -169,6 +170,10 @@ class CONTENT_EXPORT FeaturePolicy : public blink::WebFeaturePolicy {
       const ParsedFeaturePolicyHeader& container_policy,
       const url::Origin& origin);
 
+  static std::unique_ptr<FeaturePolicy> CreateFromPolicyWithOrigin(
+      const FeaturePolicy& policy,
+      const url::Origin& origin);
+
   // WebFeaturePolicy implementation
   bool IsFeatureEnabled(blink::WebFeaturePolicyFeature feature) const override;
 
@@ -181,9 +186,6 @@ class CONTENT_EXPORT FeaturePolicy : public blink::WebFeaturePolicy {
   // Unrecognized features will be ignored.
   void SetHeaderPolicy(const ParsedFeaturePolicyHeader& parsed_header);
 
-  // Update the origin to which the policy is bound.
-  void ResetOrigin(const url::Origin& origin);
-
  private:
   friend class FeaturePolicyTest;