Fix bad #endif comment.

TBR=vardhan@google.com

Review URL: https://codereview.chromium.org/2247363002 .

Cr-Mirrored-From: https://github.com/domokit/mojo
Cr-Mirrored-Commit: 6fda50b7f77dfdd62806c25b62b5000177c10f7e
diff --git a/cpp/bindings/binding_set.h b/cpp/bindings/binding_set.h
index f0d339f..b129739 100644
--- a/cpp/bindings/binding_set.h
+++ b/cpp/bindings/binding_set.h
@@ -55,4 +55,4 @@
 
 }  // namespace mojo
 
-#endif  // MOJO_COMMON_BINDING_SET_H_
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_BINDING_SET_H_