__FUNCTION__ cannot concatenate with constant strings in all compilers.

win8/test/open_with_dialog_controller.cc

Index: win8/test/open_with_dialog_controller.cc
diff --git a/win8/test/open_with_dialog_controller.cc b/win8/test/open_with_dialog_controller.cc
index b9a160903f859ef351b14cf7819a558ed7230b50..e980197f15ccd4a0171c606772535b9ea7774ee9 100644
--- a/win8/test/open_with_dialog_controller.cc
+++ b/win8/test/open_with_dialog_controller.cc
@@ -167,7 +167,7 @@ void OpenWithDialogController::Context::OnTimeout() {
   DCHECK(thread_checker_.CalledOnValidThread());
   // This is a LOG rather than a DLOG since it represents something that needs
   // to be investigated and fixed.
-  LOG(ERROR) << __FUNCTION__ " state: " << state_;
+  LOG(ERROR) << __FUNCTION__ << " state: " << state_;
 
   state_ = CONTEXT_FINISHED;
   NotifyClientAndDie();