Mojo: Fix my LOG_IF(ERROR, ...) from r262803.

mojo/system/channel.cc

Index: mojo/system/channel.cc
diff --git a/mojo/system/channel.cc b/mojo/system/channel.cc
index 4b81fea090ae3012d363471cee9d22a20c024f10..89035b380b599abafdd50c1b850c7d789c07d714 100644
--- a/mojo/system/channel.cc
+++ b/mojo/system/channel.cc
@@ -67,7 +67,7 @@ void Channel::Shutdown() {
   // things in an inconsistent state, which is worse. Note that if the map is
   // nonempty, we probably won't be destroyed, since the endpoints have a
   // reference to us.)
-  LOG_IF(ERROR, local_id_to_endpoint_info_map_.empty())
+  LOG_IF(ERROR, !local_id_to_endpoint_info_map_.empty())
       << "Channel shutting down with endpoints still attached";
   // TODO(vtl): This currently blows up, but the fix will be nontrivial.
   // crbug.com/360081