Add end to end test for Media galleries scan API.

chrome/browser/media_galleries/media_galleries_scan_result_dialog_controller.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_SCAN_RESULT_DIALOG_CONTROLLER_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_GALLERIES_SCAN_RESULT_DIALOG_CONTROLLER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 24 matching lines @@
 class MediaGalleriesScanResultDialog {
  public:
   virtual ~MediaGalleriesScanResultDialog();
 
   // Tell the dialog to update its display list of scan results.
   virtual void UpdateResults() = 0;
 
   // Constructs a platform-specific dialog owned and controlled by |controller|.
   static MediaGalleriesScanResultDialog* Create(
       MediaGalleriesScanResultDialogController* controller);
+
+ private:
+  friend class TestMediaGalleriesAddScanResultsFunction;
+
+  virtual void AcceptDialogForTesting() = 0;
 };
 
 // The controller is responsible for handling the logic of the dialog and
 // interfacing with the model (i.e., MediaGalleriesPreferences). It shows
 // the dialog and owns itself.
 class MediaGalleriesScanResultDialogController
     : public RemovableStorageObserver,
       public MediaGalleriesPreferences::GalleryChangeObserver {
  public:
   struct ScanResult {
@@ skipping 62 matching lines @@
       const extensions::Extension& extension,
       MediaGalleriesPreferences* preferences_,
       const CreateDialogCallback& create_dialog_callback,
       const base::Closure& on_finish);
 
   virtual ~MediaGalleriesScanResultDialogController();
 
  private:
   friend class MediaGalleriesScanResultDialogControllerTest;
   friend class MediaGalleriesScanResultDialogCocoaTest;
+  friend class TestMediaGalleriesAddScanResultsFunction;
 
   // Bottom half of constructor -- called when |preferences_| is initialized.
   void OnPreferencesInitialized();
 
   // Used to keep the dialog in sync with the preferences.
   void OnPreferenceUpdate(const std::string& extension_id);
 
   // Used to keep the dialog in sync with attached and detached devices.
   void OnRemovableDeviceUpdate(const std::string device_id);
 
@@ skipping 46 matching lines @@
 
   // The view that's showing.
   scoped_ptr<MediaGalleriesScanResultDialog> dialog_;
 
   scoped_ptr<MediaGalleryContextMenu> context_menu_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaGalleriesScanResultDialogController);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_GALLERIES_SCAN_RESULT_DIALOG_CONTROLLER_H_