Add a instance groups to Connect(), and introduce an Identity struct.

components/filesystem/file_system_impl.cc

Index: components/filesystem/file_system_impl.cc
diff --git a/components/filesystem/file_system_impl.cc b/components/filesystem/file_system_impl.cc
index d64427a65ab2e45cc7bc7fc2c62a116b9be32a56..f8b9594dc9d5b48c5be7a23d03a2696241b607bb 100644
--- a/components/filesystem/file_system_impl.cc
+++ b/components/filesystem/file_system_impl.cc
@@ -24,7 +24,7 @@ FileSystemImpl::FileSystemImpl(mojo::Connection* connection,
                                mojo::InterfaceRequest<FileSystem> request,
                                base::FilePath persistent_dir,
                                LockTable* lock_table)
-    : remote_application_name_(connection->GetRemoteApplicationName()),
+    : remote_application_name_(connection->GetRemoteIdentity().name()),
       binding_(this, std::move(request)),
       lock_table_(lock_table),
       persistent_dir_(persistent_dir) {}