1 files changed, 28 insertions, 0 deletions
diff --git a/security/sandbox/chromium/base/callback_forward.h b/security/sandbox/chromium/base/callback_forward.h
new file mode 100644
index 0000000000..d0f230cedb
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+++ b/security/sandbox/chromium/base/callback_forward.h
@@ -0,0 +1,28 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_CALLBACK_FORWARD_H_
+#define BASE_CALLBACK_FORWARD_H_
+
+namespace base {
+
+template <typename Signature>
+class OnceCallback;
+
+template <typename Signature>
+class RepeatingCallback;
+
+template <typename Signature>
+using Callback = RepeatingCallback<Signature>;
+
+// Syntactic sugar to make OnceClosure<void()> and RepeatingClosure<void()>
+// easier to declare since they will be used in a lot of APIs with delayed
+// execution.
+using OnceClosure = OnceCallback<void()>;
+using RepeatingClosure = RepeatingCallback<void()>;
+using Closure = Callback<void()>;
+
+}  // namespace base
+
+#endif  // BASE_CALLBACK_FORWARD_H_