Remove old permission delegation prototype

content/common/frame_owner_properties.h

Index: content/common/frame_owner_properties.h
diff --git a/content/common/frame_owner_properties.h b/content/common/frame_owner_properties.h
index 20d3510c8666688dc6565b747cbdf3b795b55fcd..6f484764c952f2e744ba0f896f1ff16b7033d60d 100644
--- a/content/common/frame_owner_properties.h
+++ b/content/common/frame_owner_properties.h
@@ -9,7 +9,6 @@
 
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebFeaturePolicy.h"
-#include "third_party/WebKit/public/platform/modules/permissions/permission.mojom.h"
 #include "third_party/WebKit/public/web/WebFrameOwnerProperties.h"
 
 namespace content {
@@ -41,7 +40,6 @@ struct CONTENT_EXPORT FrameOwnerProperties {
   // https://www.w3.org/TR/csp-embedded-enforcement/#required-csp
   std::string required_csp;
 
-  std::vector<blink::mojom::PermissionName> delegated_permissions;
   std::vector<blink::WebFeaturePolicyFeature> allowed_features;
 };