Remove some dead code.

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 1029 matching lines @@
         'browser/media_gallery/mac/mtp_device_delegate_impl_mac.h',
         'browser/media_gallery/mac/mtp_device_delegate_impl_mac.mm',
         'browser/media_gallery/media_file_system_registry.cc',
         'browser/media_gallery/media_file_system_registry.h',
         'browser/media_gallery/media_galleries_dialog_controller.cc',
         'browser/media_gallery/media_galleries_dialog_controller.h',
         'browser/media_gallery/media_galleries_preferences.cc',
         'browser/media_gallery/media_galleries_preferences.h',
         'browser/media_gallery/media_galleries_preferences_factory.cc',
         'browser/media_gallery/media_galleries_preferences_factory.h',
-        'browser/media_gallery/media_gallery_database.cc',
-        'browser/media_gallery/media_gallery_database.h',
-        'browser/media_gallery/media_gallery_database_types.cc',
-        'browser/media_gallery/media_gallery_database_types.h',
         'browser/media_gallery/mtp_device_delegate_impl.h',
         'browser/media_gallery/scoped_mtp_device_map_entry.cc',
         'browser/media_gallery/scoped_mtp_device_map_entry.h',
         'browser/media_gallery/win/mtp_device_delegate_impl_win.cc',
         'browser/media_gallery/win/mtp_device_delegate_impl_win.h',
         'browser/media_gallery/win/mtp_device_object_entry.cc',
         'browser/media_gallery/win/mtp_device_object_entry.h',
         'browser/media_gallery/win/mtp_device_object_enumerator.cc',
         'browser/media_gallery/win/mtp_device_object_enumerator.h',
         'browser/media_gallery/win/mtp_device_operations_util.cc',
@@ skipping 2057 matching lines @@
           'variables': {
             'jni_gen_dir': 'chrome',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
       ],
      },
     ],
   ],
 }