Reland: Fall back to X11 system tray icons if libappindicator is not available.

chrome/browser/ui/libgtk2ui/gtk2_status_icon.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_STATUS_ICON_H_
+#define CHROME_BROWSER_UI_LIBGTK2UI_GTK2_STATUS_ICON_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/string16.h"
+#include "chrome/browser/ui/libgtk2ui/gtk2_signal.h"
+#include "ui/base/glib/glib_integers.h"
+#include "ui/base/glib/glib_signal.h"
+#include "ui/views/linux_ui/status_icon_linux.h"
+
+typedef struct _GtkStatusIcon GtkStatusIcon;
+
+namespace gfx {
+class ImageSkia;
+}
+
+namespace ui {
+class MenuModel;
+}
+
+namespace libgtk2ui {
+class AppIndicatorIconMenu;
+
+// Status icon implementation which uses the system tray X11 spec (via
+// GtkStatusIcon).
+class Gtk2StatusIcon : public views::StatusIconLinux {
+ public:
+  Gtk2StatusIcon(const gfx::ImageSkia& image, const base::string16& tool_tip);
+  virtual ~Gtk2StatusIcon();
+
+  // Overridden from views::StatusIconLinux:
+  virtual void SetImage(const gfx::ImageSkia& image) OVERRIDE;
+  virtual void SetPressedImage(const gfx::ImageSkia& image) OVERRIDE;
+  virtual void SetToolTip(const base::string16& tool_tip) OVERRIDE;
+  virtual void UpdatePlatformContextMenu(ui::MenuModel* menu) OVERRIDE;
+  virtual void RefreshPlatformContextMenu() OVERRIDE;
+
+ private:
+  CHROMEG_CALLBACK_0(Gtk2StatusIcon, void, OnClick, GtkStatusIcon*);
+
+  CHROMEG_CALLBACK_2(Gtk2StatusIcon,
+                     void,
+                     OnContextMenuRequested,
+                     GtkStatusIcon*,
+                     guint,
+                     guint);
+
+  GtkStatusIcon* gtk_status_icon_;
+
+  scoped_ptr<AppIndicatorIconMenu> menu_;
+
+  DISALLOW_COPY_AND_ASSIGN(Gtk2StatusIcon);
+};
+
+}  // namespace libgtk2ui
+
+#endif  // CHROME_BROWSER_UI_LIBGTK2UI_GTK2_STATUS_ICON_H_