perf ui gtk: Add perf_gtk__show_helpline() for pr_*

Use helpline for printing error/debug messages. The code resembles a TUI
counter part and only print the first line of the message.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1345104894-14205-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c
index 4dfe0bb..66eb382 100644
--- a/tools/perf/util/debug.c
+++ b/tools/perf/util/debug.c
@@ -23,8 +23,10 @@
 
 	if (verbose >= level) {
 		va_start(args, fmt);
-		if (use_browser > 0)
+		if (use_browser == 1)
 			ret = ui_helpline__show_help(fmt, args);
+		else if (use_browser == 2)
+			ret = perf_gtk__show_helpline(fmt, args);
 		else
 			ret = vfprintf(stderr, fmt, args);
 		va_end(args);