Replicate feature policy container policies.

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 9f3c2a1c17a29d1ea0a4ad38ab7d9f772c3137ed..e92eb6adf297a16cf3e8e071f06048f6308dd7af 100644
--- a/content/common/feature_policy/feature_policy.h
+++ b/content/common/feature_policy/feature_policy.h
@@ -102,6 +102,9 @@ struct CONTENT_EXPORT ParsedFeaturePolicyDeclaration {
 
 using ParsedFeaturePolicyHeader = std::vector<ParsedFeaturePolicyDeclaration>;
 
+bool CONTENT_EXPORT operator==(const ParsedFeaturePolicyDeclaration& lhs,
+                               const ParsedFeaturePolicyDeclaration& rhs);
+
 class CONTENT_EXPORT FeaturePolicy : public blink::WebFeaturePolicy {
  public:
   // Represents a collection of origins which make up a whitelist in a feature