Media Galleries: Allow readding blacklisted iApps libraries.

chrome/browser/media_galleries/fileapi/iapps_finder.h

 // Copyright 2013 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_FILEAPI_IAPPS_FINDER_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_IAPPS_FINDER_H_
 
 #include <string>
 
 #include "base/callback.h"
 
 namespace iapps {
 
 typedef base::Callback<void(const std::string&)> IAppsFinderCallback;
 
 // These methods look for the iTunes/iPhoto library in in an asynchronous
 // manner and call |callback| on the UI thread as soon as the result is known.
 // If a library exists, |callback| gets the device id for the library. If a
 // library does not exist, or the OS does not support iTunes/iPhoto, then
 // |callback| gets an empty string.
 
 void FindIPhotoLibrary(const IAppsFinderCallback& callback);
 
 void FindITunesLibrary(const IAppsFinderCallback& callback);
 
+// Returns true if |path| is a directory within the iTunes or iPhoto device
+// specified by |unique_id| (the unique part of the device id).
+bool PathWithinIAppsLibrary(const std::string& unique_id,
+                            const base::FilePath& path);
+
 }  // namespace iapps
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_IAPPS_FINDER_H_