Use the media galleries controller interface for the scan result dialog.

chrome/browser/media_galleries/media_galleries_dialog_controller_test_util.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_GALLERIES_DIALOG_CONTROLLER_TEST_UTIL_H_
+#define CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_GALLERIES_DIALOG_CONTROLLER_TEST_UTIL_H_
+
+#include "base/callback.h"
+#include "chrome/browser/media_galleries/media_galleries_dialog_controller.h"
+
+class MockMediaGalleriesDialog : public MediaGalleriesDialog {
+ public:
+  typedef base::Callback<void(int update_count)> DialogDestroyedCallback;
+
+  explicit MockMediaGalleriesDialog(const DialogDestroyedCallback& callback);
+  virtual ~MockMediaGalleriesDialog();
+
+  // MediaGalleriesDialog implementation.
+  virtual void UpdateGalleries() OVERRIDE;
+
+  // Number up times UpdateResults has been called.
+  int update_count() const;
+
+ private:
+  // MediaGalleriesDialog implementation.
+  virtual void AcceptDialogForTesting() OVERRIDE;
+
+  int update_count_;
+
+  DialogDestroyedCallback dialog_destroyed_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockMediaGalleriesDialog);
+};
+
+#endif  // CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_GALLERIES_DIALOG_CONTROLLER_TEST_UTIL_H_