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

chrome/chrome_browser.gypi

 # Copyright 2012 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 1149 matching lines @@
         'browser/media_galleries/media_galleries_dialog_controller.cc',
         'browser/media_galleries/media_galleries_dialog_controller.h',
         'browser/media_galleries/media_galleries_histograms.cc',
         'browser/media_galleries/media_galleries_histograms.h',
         'browser/media_galleries/media_galleries_preferences.cc',
         'browser/media_galleries/media_galleries_preferences.h',
         'browser/media_galleries/media_galleries_preferences_factory.cc',
         'browser/media_galleries/media_galleries_preferences_factory.h',
         'browser/media_galleries/media_galleries_scan_result_dialog_controller.cc',
         'browser/media_galleries/media_galleries_scan_result_dialog_controller.h',
+        'browser/media_galleries/media_gallery_context_menu.cc',
+        'browser/media_galleries/media_gallery_context_menu.h',
         'browser/media_galleries/media_scan_manager.cc',
         'browser/media_galleries/media_scan_manager.h',
         'browser/media_galleries/media_scan_manager_observer.h',
         'browser/media_galleries/win/mtp_device_delegate_impl_win.cc',
         'browser/media_galleries/win/mtp_device_delegate_impl_win.h',
         'browser/media_galleries/win/mtp_device_object_entry.cc',
         'browser/media_galleries/win/mtp_device_object_entry.h',
         'browser/media_galleries/win/mtp_device_object_enumerator.cc',
         'browser/media_galleries/win/mtp_device_object_enumerator.h',
         'browser/media_galleries/win/mtp_device_operations_util.cc',
@@ skipping 2538 matching lines @@
             'package_name': 'org/chromium/chrome/browser/ui/toolbar',
             'template_deps': ['browser/ui/toolbar/toolbar_model_security_level_list.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }