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

chrome/browser/media_galleries/media_galleries_dialog_controller_test_util.cc

+// 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.
+
+#include "chrome/browser/media_galleries/media_galleries_dialog_controller_test_util.h"
+
+MockMediaGalleriesDialog::MockMediaGalleriesDialog(
+    const DialogDestroyedCallback& callback)
+    : update_count_(0),
+  dialog_destroyed_callback_(callback) {
+}
+
+MockMediaGalleriesDialog::~MockMediaGalleriesDialog() {
+  dialog_destroyed_callback_.Run(update_count_);
+}
+
+void MockMediaGalleriesDialog::UpdateGalleries() {
+  update_count_++;
+}
+
+int MockMediaGalleriesDialog::update_count() {
+  return update_count_;
+}
+
+void MockMediaGalleriesDialog::AcceptDialogForTesting() {
+  NOTREACHED();
+}