Explicitly Document base/bind_helpers.h Comes with base/bind.h

base/bind.h

Index: base/bind.h
diff --git a/base/bind.h b/base/bind.h
index ce717972e26cde23941d545ef5e3f8832309466e..0ef8074222ea653e46e65a2fdc62dd868673d9e8 100644
--- a/base/bind.h
+++ b/base/bind.h
@@ -12,7 +12,8 @@
 // -----------------------------------------------------------------------------
 //
 // See //docs/callback.md for documentation.
-//
+// It's not necessary to include base/bind_helpers.h in your implementation.

[dcheng, 2016/10/18 19:30:56]

Nit: "your implementation" feels a little vague here: this can be read to mean
the implementation of base::Bind.

[robliao, 2016/10/18 19:35:17]

Updated to "your file".

+// Those functions are assumed to be part of this library.
 //
 // -----------------------------------------------------------------------------
 // Implementation notes