From d473e4a5ac1218659f30afee0486143ab7e1f134 Mon Sep 17 00:00:00 2001
From: Andrew McCreight <continuation@gmail.com>
Date: Thu, 10 Sep 2015 13:17:00 +0200
Subject: [PATCH] Bug 1203314 - Make operator<< a method on unused_t. r=froydnj

This prevents operator overload resolution from failing when this file
is included in a file that uses Chromium IPC logging.
---
 mfbt/unused.h | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/mfbt/unused.h b/mfbt/unused.h
index 79e0536c39f..e9db127c3a5 100644
--- a/mfbt/unused.h
+++ b/mfbt/unused.h
@@ -19,16 +19,13 @@ namespace mozilla {
 //
 struct unused_t
 {
+  template<typename T>
+  inline void
+  operator<<(const T& /*unused*/) const {}
 };
 
 extern MFBT_DATA const unused_t unused;
 
-template<typename T>
-inline void
-operator<<(const unused_t& /*unused*/, const T& /*unused*/)
-{
-}
-
 } // namespace mozilla
 
 #endif // __cplusplus