Port back_forward_menu_model to linux.

* Refactor BackForwardMenuModel.
 - Create platform-specific subclasses that implement menu delegate interfaces
 - Push almost all functionality into BackForwardMenuModel
* Implement GTK back/forward dropdowns (in MenuGtk and BrowserToolbarViewGtk)

Review URL: http://codereview.chromium.org/21440

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@9983 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 34 insertions, 0 deletions

diff --git a/chrome/browser/gtk/back_forward_menu_model_gtk.h b/chrome/browser/gtk/back_forward_menu_model_gtk.h
new file mode 100644
index 0000000..59ff869
--- /dev/null
+++ b/chrome/browser/gtk/back_forward_menu_model_gtk.h
@@ -0,0 +1,34 @@
+// Copyright (c) 2009 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_BACK_FORWARD_MENU_MODEL_GTK_H_
+#define CHROME_BROWSER_BACK_FORWARD_MENU_MODEL_GTK_H_
+
+#include "base/basictypes.h"
+
+#include "chrome/browser/back_forward_menu_model.h"
+#include "chrome/browser/gtk/menu_gtk.h"
+
+// For the most part, this class simply passes calls through to
+// the BackForwardMenuModel.
+class BackForwardMenuModelGtk : public BackForwardMenuModel,
+                                public MenuGtk::Delegate {
+ public:
+  BackForwardMenuModelGtk(Browser* browser, ModelType model_type);
+
+  // MenuGtk::Delegate
+  virtual int GetItemCount() const;
+  virtual bool IsItemSeparator(int menu_id) const;
+  virtual std::string GetLabel(int menu_id) const;
+  virtual bool HasIcon(int menu_id) const;
+  virtual const SkBitmap* GetIcon(int menu_id) const;
+  virtual bool IsCommandEnabled(int command_id) const;
+  virtual void ExecuteCommand(int command_id);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BackForwardMenuModelGtk);
+};
+
+#endif  // CHROME_BROWSER_BACK_FORWARD_MENU_MODEL_GTK_H_
+