perf ui: Reimplement the popup windows using libslang

Just another step in stopping the use of libnewt in perf.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-vtxnmz1t1807ykprapnk9njl@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/ui/browsers/annotate.c b/tools/perf/util/ui/browsers/annotate.c
index 4e0cb7fe..0575905 100644
--- a/tools/perf/util/ui/browsers/annotate.c
+++ b/tools/perf/util/ui/browsers/annotate.c
@@ -1,6 +1,9 @@
+#include "../../util.h"
 #include "../browser.h"
 #include "../helpline.h"
 #include "../libslang.h"
+#include "../ui.h"
+#include "../util.h"
 #include "../../annotate.h"
 #include "../../hist.h"
 #include "../../sort.h"
@@ -8,15 +11,6 @@
 #include <pthread.h>
 #include <newt.h>
 
-static void ui__error_window(const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	newtWinMessagev((char *)"Error", (char *)"Ok", (char *)fmt, ap);
-	va_end(ap);
-}
-
 struct annotate_browser {
 	struct ui_browser b;
 	struct rb_root	  entries;
@@ -400,7 +394,7 @@
 		return -1;
 
 	if (symbol__annotate(sym, map, sizeof(struct objdump_line_rb_node)) < 0) {
-		ui__error_window(ui_helpline__last_msg);
+		ui__error("%s", ui_helpline__last_msg);
 		return -1;
 	}