diff --git a/third_party/chromium/base/callback_forward.h b/third_party/chromium/base/callback_forward.h
index 262c306..a9a263a 100644
--- a/third_party/chromium/base/callback_forward.h
+++ b/third_party/chromium/base/callback_forward.h
@@ -10,7 +10,9 @@
 template <typename Sig>
 class Callback;
 
-typedef Callback<void(void)> Closure;
+// Syntactic sugar to make Callback<void()> easier to declare since it
+// will be used in a lot of APIs with delayed execution.
+using Closure = Callback<void()>;
 
 }  // namespace base