[linux/aura] Supports IBus in async mode.

chrome/browser/ui/libgtk2ui/gtk2_event_loop.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_LIBGTK2UI_GTK2_EVENT_LOOP_H_
+#define CHROME_BROWSER_UI_LIBGTK2UI_GTK2_EVENT_LOOP_H_
+
+#include "base/macros.h"
+#include "ui/base/glib/glib_integers.h"
+
+typedef union _GdkEvent GdkEvent;
+typedef struct _GdkEventKey GdkEventKey;
+
+template<typename Type> struct DefaultSingletonTraits;
+
+namespace libgtk2ui {
+
+class Gtk2EventLoop {
+ public:
+  static Gtk2EventLoop* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<Gtk2EventLoop>;
+
+  Gtk2EventLoop();
+  ~Gtk2EventLoop();
+
+  static void GdkEventTrampoline(GdkEvent* event, gpointer data);
+
+  void DispatchGdkEvent(GdkEvent* gdk_event);
+  void ProcessGdkEventKey(const GdkEventKey& gdk_event_key);
+
+  DISALLOW_COPY_AND_ASSIGN(Gtk2EventLoop);
+};
+
+}  // namespace libgtk2ui
+
+#endif  // CHROME_BROWSER_UI_LIBGTK2UI_GTK2_EVENT_LOOP_H_