Abstract media galleries context menu code and use it in scan result dialog.

chrome/browser/media_galleries/media_gallery_context_menu.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_MEDIA_GALLERIES_MEDIA_GALLERY_CONTEXT_MENU_H_
+#define CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_GALLERY_CONTEXT_MENU_H_
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "chrome/browser/media_galleries/media_galleries_preferences.h"
+#include "ui/base/models/simple_menu_model.h"
+
+class MediaGalleryContextMenu : public ui::SimpleMenuModel,
+                                public ui::SimpleMenuModel::Delegate {
+ public:
+  typedef base::Callback<void(MediaGalleryPrefId pref_id)>
+      ForgetGalleryCallback;
+
+  explicit MediaGalleryContextMenu(const ForgetGalleryCallback& callback);
+  virtual ~MediaGalleryContextMenu();
+
+  void set_pref_id(MediaGalleryPrefId pref_id) {
+    pref_id_ = pref_id;
+  }
+
+  // ui::SimpleMenuModel::Delegate overrides:
+  virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
+  virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
+  virtual bool IsCommandIdVisible(int command_id) const OVERRIDE;
+  virtual bool GetAcceleratorForCommandId(
+      int command_id, ui::Accelerator* accelerator) OVERRIDE;
+  virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE;
+
+ private:
+  MediaGalleryPrefId pref_id_;
+  ForgetGalleryCallback callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaGalleryContextMenu);
+};
+
+#endif  // CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_GALLERY_CONTEXT_MENU_H_