Add a copy or move validator to that can handle support audio and video files.

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 670632711c34c3bc62ceaf012036162175acc953..c27339cfd3fb0bfaf64c25699692ff12032f2edc 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -989,6 +989,8 @@
         'browser/media/webrtc_logging_handler_host.h',
         'browser/media_galleries/fileapi/av_scanning_file_validator.cc',
         'browser/media_galleries/fileapi/av_scanning_file_validator.h',
+        'browser/media_galleries/fileapi/device_media_async_file_util.cc',
+        'browser/media_galleries/fileapi/device_media_async_file_util.h',
         'browser/media_galleries/fileapi/itunes_finder.cc',
         'browser/media_galleries/fileapi/itunes_finder.h',
         'browser/media_galleries/fileapi/itunes_finder_mac.h',
@@ -1001,12 +1003,19 @@
         'browser/media_galleries/fileapi/media_file_validator_factory.cc',
         'browser/media_galleries/fileapi/media_path_filter.cc',
         'browser/media_galleries/fileapi/media_path_filter.h',
+        'browser/media_galleries/fileapi/mtp_device_async_delegate.h',
+        'browser/media_galleries/fileapi/mtp_device_map_service.cc',
+        'browser/media_galleries/fileapi/mtp_device_map_service.h',
         'browser/media_galleries/fileapi/native_media_file_util.cc',
         'browser/media_galleries/fileapi/native_media_file_util.h',
         'browser/media_galleries/fileapi/picasa/picasa_finder.cc',
         'browser/media_galleries/fileapi/picasa/picasa_finder.h',
+        'browser/media_galleries/fileapi/safe_audio_video_checker.cc',
+        'browser/media_galleries/fileapi/safe_audio_video_checker.h',
         'browser/media_galleries/fileapi/safe_itunes_pref_parser_win.cc',
         'browser/media_galleries/fileapi/safe_itunes_pref_parser_win.h',
+        'browser/media_galleries/fileapi/supported_audio_video_checker.cc',
+        'browser/media_galleries/fileapi/supported_audio_video_checker.h',
         'browser/media_galleries/fileapi/supported_image_type_validator.cc',
         'browser/media_galleries/fileapi/supported_image_type_validator.h',
         'browser/media_galleries/imported_media_gallery_registry.cc',
@@ -2508,15 +2517,6 @@
             'xcode_settings': {'OTHER_LDFLAGS': ['-weak_framework CoreImage']},
           },
         }],
-        ['OS=="win" or OS=="mac" or OS=="linux" or chromeos==1', {
-          'sources': [
-            'browser/media_galleries/fileapi/device_media_async_file_util.cc',
-            'browser/media_galleries/fileapi/device_media_async_file_util.h',
-            'browser/media_galleries/fileapi/mtp_device_async_delegate.h',
-            'browser/media_galleries/fileapi/mtp_device_map_service.cc',
-            'browser/media_galleries/fileapi/mtp_device_map_service.h',
-          ],
-        }],
         ['OS=="win" or OS=="mac"', {
           'sources': [
             'browser/media_galleries/fileapi/itunes_data_provider.cc',