Allow script to request durable storage permission (chrome side)

content/browser/permissions/permission_service_impl.cc

Index: content/browser/permissions/permission_service_impl.cc
diff --git a/content/browser/permissions/permission_service_impl.cc b/content/browser/permissions/permission_service_impl.cc
index 5700bac1cffc1433f53240439b4d1e8a26a66a70..61ca3a1517a698c37fdf331778d2a849855ca342 100644
--- a/content/browser/permissions/permission_service_impl.cc
+++ b/content/browser/permissions/permission_service_impl.cc
@@ -27,6 +27,8 @@ PermissionType PermissionNameToPermissionType(PermissionName name) {
       return PermissionType::MIDI_SYSEX;
     case PERMISSION_NAME_PROTECTED_MEDIA_IDENTIFIER:
       return PermissionType::PROTECTED_MEDIA_IDENTIFIER;
+    case PERMISSION_NAME_DURABLE_STORAGE:
+      return PermissionType::DURABLE_STORAGE;
   }
 
   NOTREACHED();