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

content/child/blink_platform_impl.cc

Index: content/child/blink_platform_impl.cc
diff --git a/content/child/blink_platform_impl.cc b/content/child/blink_platform_impl.cc
index b2b964a690c121637c09c5e9385c0e7f1378518e..0b41bff1199ca0e08cb56193556e4d79a0bf3cbe 100644
--- a/content/child/blink_platform_impl.cc
+++ b/content/child/blink_platform_impl.cc
@@ -39,6 +39,7 @@
 #include "content/app/strings/grit/content_strings.h"
 #include "content/child/child_thread_impl.h"
 #include "content/child/content_child_helpers.h"
+#include "content/child/feature_policy/feature_policy_platform.h"
 #include "content/child/notifications/notification_dispatcher.h"
 #include "content/child/notifications/notification_manager.h"
 #include "content/child/push_messaging/push_provider.h"
@@ -850,4 +851,25 @@ int BlinkPlatformImpl::domKeyEnumFromString(const WebString& key_string) {
       ui::KeycodeConverter::KeyStringToDomKey(key_string.utf8()));
 }
 
+blink::WebFeaturePolicy* BlinkPlatformImpl::createFeaturePolicy(
+    const blink::WebFeaturePolicy* parent_policy,
+    const blink::WebParsedFeaturePolicyHeader& container_policy,
+    const blink::WebParsedFeaturePolicyHeader& policy_header,
+    const blink::WebSecurityOrigin& origin) {
+  std::unique_ptr<FeaturePolicy> policy = FeaturePolicy::CreateFromParentPolicy(
+      static_cast<const FeaturePolicy*>(parent_policy),
+      FeaturePolicyHeaderFromWeb(container_policy), url::Origin(origin));
+  policy->SetHeaderPolicy(FeaturePolicyHeaderFromWeb(policy_header));
+  return policy.release();
+}
+
+blink::WebFeaturePolicy* BlinkPlatformImpl::duplicateFeaturePolicyWithOrigin(
+    const blink::WebFeaturePolicy& policy,
+    const blink::WebSecurityOrigin& new_origin) {
+  std::unique_ptr<FeaturePolicy> new_policy =
+      FeaturePolicy::CreateFromPolicyWithOrigin(
+          static_cast<const FeaturePolicy&>(policy), url::Origin(new_origin));
+  return new_policy.release();
+}
+
 }  // namespace content