perf ui: Add gtk2 support into setup_browser()

Now setup_browser can handle gtk2 front-end so split the TUI code to
ui/tui/setup.c in order to remove dependency.

To this end, make ui__init/exit global symbols and take an argument.
Also split gtk code to ui/gtk/setup.c.

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
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/1335761711-31403-5-git-send-email-namhyung.kim@lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index 3428b77..761d4e9 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -33,7 +33,7 @@
 
 extern int use_browser;
 
-#ifdef NO_NEWT_SUPPORT
+#if defined(NO_NEWT_SUPPORT) && defined(NO_GTK2_SUPPORT)
 static inline void setup_browser(bool fallback_to_pager)
 {
 	if (fallback_to_pager)
@@ -43,19 +43,32 @@
 #else
 void setup_browser(bool fallback_to_pager);
 void exit_browser(bool wait_for_ok);
+
+#ifdef NO_NEWT_SUPPORT
+static inline int ui__init(bool fallback_to_pager)
+{
+	if (fallback_to_pager)
+		setup_pager();
+	return 0;
+}
+static inline void ui__exit(bool wait_for_ok __used) {}
+#else
+int ui__init(bool fallback_to_pager);
+void ui__exit(bool wait_for_ok);
 #endif
 
 #ifdef NO_GTK2_SUPPORT
-static inline void perf_gtk__setup_browser(bool fallback_to_pager)
+static inline void perf_gtk__init(bool fallback_to_pager)
 {
 	if (fallback_to_pager)
 		setup_pager();
 }
-static inline void perf_gtk__exit_browser(bool wait_for_ok __used) {}
+static inline void perf_gtk__exit(bool wait_for_ok __used) {}
 #else
-void perf_gtk__setup_browser(bool fallback_to_pager);
-void perf_gtk__exit_browser(bool wait_for_ok);
+void perf_gtk__init(bool fallback_to_pager);
+void perf_gtk__exit(bool wait_for_ok);
 #endif
+#endif /* NO_NEWT_SUPPORT && NO_GTK2_SUPPORT */
 
 char *alias_lookup(const char *alias);
 int split_cmdline(char *cmdline, const char ***argv);