Make content::FeaturePolicy implement WebFeaturePolicy, and use it in blink code

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 44f9e11f2667a5f59dad7b5652fd8e4257ed0511..8b2b6b0f4b2f190573021d3bb8ef391d85c1eac1 100644
--- a/content/common/feature_policy/feature_policy.h
+++ b/content/common/feature_policy/feature_policy.h
@@ -96,7 +96,7 @@ struct CONTENT_EXPORT ParsedFeaturePolicyDeclaration {
 
 using ParsedFeaturePolicyHeader = std::vector<ParsedFeaturePolicyDeclaration>;
 
-class CONTENT_EXPORT FeaturePolicy {
+class CONTENT_EXPORT FeaturePolicy : public blink::WebFeaturePolicy {
  public:
   // Represents a collection of origins which make up a whitelist in a feature
   // policy. This collection may be set to match every origin (corresponding to
@@ -155,7 +155,7 @@ class CONTENT_EXPORT FeaturePolicy {
   using FeatureList =
       std::map<blink::WebFeaturePolicyFeature, const FeaturePolicy::Feature*>;
 
-  ~FeaturePolicy();
+  ~FeaturePolicy() override;
 
   static std::unique_ptr<FeaturePolicy> CreateFromParentPolicy(
       const FeaturePolicy* parent_policy,
@@ -173,6 +173,8 @@ class CONTENT_EXPORT FeaturePolicy {
   // Unrecognized features will be ignored.
   void SetHeaderPolicy(const ParsedFeaturePolicyHeader& parsed_header);
 
+  void SetOrigin(url::Origin origin) { origin_ = origin; }
+
  private:
   friend class FeaturePolicyTest;