Revert of Add a has_media flag to VolumeMetadata.

chrome/browser/chromeos/file_manager/volume_manager.cc

Index: chrome/browser/chromeos/file_manager/volume_manager.cc
diff --git a/chrome/browser/chromeos/file_manager/volume_manager.cc b/chrome/browser/chromeos/file_manager/volume_manager.cc
index 5af7efe4eae0219a592c3d9a23182da7716682ad..48bf7f75c0f075583811d26133ba83f3c7092cda 100644
--- a/chrome/browser/chromeos/file_manager/volume_manager.cc
+++ b/chrome/browser/chromeos/file_manager/volume_manager.cc
@@ -179,13 +179,11 @@
         base::FilePath(disk->system_path_prefix());
     volume_info.is_parent = disk->is_parent();
     volume_info.is_read_only = disk->is_read_only();
-    volume_info.has_media = disk->has_media();
   } else {
     volume_info.device_type = chromeos::DEVICE_TYPE_UNKNOWN;
     volume_info.is_parent = false;
     volume_info.is_read_only =
         (mount_point.mount_type == chromeos::MOUNT_TYPE_ARCHIVE);
-    volume_info.has_media = false;
   }
   volume_info.volume_id = GenerateVolumeId(volume_info);