Implement DelegationTracker for tracking delegated permissions to RenderFrameHosts

chrome/browser/permissions/permission_manager.h

Index: chrome/browser/permissions/permission_manager.h
diff --git a/chrome/browser/permissions/permission_manager.h b/chrome/browser/permissions/permission_manager.h
index 3e7731470164cbfdbdcd45253a8b23a9ae4b4517..330dd9555f4e8f1d55fc9ecc47193aad81c2bad9 100644
--- a/chrome/browser/permissions/permission_manager.h
+++ b/chrome/browser/permissions/permission_manager.h
@@ -11,6 +11,7 @@
 #include "base/id_map.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/permissions/permission_util.h"
 #include "components/content_settings/core/browser/content_settings_observer.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/keyed_service/core/keyed_service.h"
@@ -78,10 +79,6 @@ class PermissionManager : public KeyedService,
   struct Subscription;
   using SubscriptionsMap = IDMap<Subscription, IDMapOwnPointer>;
 
-  struct PermissionTypeHash {
-    std::size_t operator()(const content::PermissionType& type) const;
-  };
-
   PermissionContextBase* GetPermissionContext(content::PermissionType type);
 
   // Called when a permission was decided for a given PendingRequest. The