Extensions: Remove PermissionMessage (permission_message.h/cc)

extensions/common/api/sockets/sockets_manifest_permission.h

Index: extensions/common/api/sockets/sockets_manifest_permission.h
diff --git a/extensions/common/api/sockets/sockets_manifest_permission.h b/extensions/common/api/sockets/sockets_manifest_permission.h
index 324acd6db337f78f1862bbc3a48cd181691f1582..555795769a027886fb290e146f9452b6a97bece5 100644
--- a/extensions/common/api/sockets/sockets_manifest_permission.h
+++ b/extensions/common/api/sockets/sockets_manifest_permission.h
@@ -55,8 +55,7 @@ class SocketsManifestPermission : public ManifestPermission {
   // Adds the permissions from |sockets| into the permission lists |ids| and
   // |messages|. If either is NULL, that list is ignored.
   static void AddSocketHostPermissions(const SocketPermissionEntrySet& sockets,
-                                       PermissionIDSet* ids,
-                                       PermissionMessages* messages);
+                                       PermissionIDSet* ids);
 
   SocketPermissionEntrySet permissions_;
 };