[Mac] Remove usage of deprecated FNNotifyByPath().

chrome/browser/download/download_status_updater_mac.mm

Index: chrome/browser/download/download_status_updater_mac.mm
diff --git a/chrome/browser/download/download_status_updater_mac.mm b/chrome/browser/download/download_status_updater_mac.mm
index 2cdb9523ab840055ec560c3b7def6cbe99e8b5b0..574553b641ce23f2d825c80d0a9e3f852405ad0f 100644
--- a/chrome/browser/download/download_status_updater_mac.mm
+++ b/chrome/browser/download/download_status_updater_mac.mm
@@ -242,10 +242,6 @@ void DownloadStatusUpdater::UpdateAppIconDownloadProgress(
     }
 
     // Notify the Finder.
-    NSString* parent_path = [download_path stringByDeletingLastPathComponent];
-    FNNotifyByPath(
-        reinterpret_cast<const UInt8*>([parent_path fileSystemRepresentation]),
-        kFNDirectoryModifiedMessage,
-        kNilOptions);
+    [[NSWorkspace sharedWorkspace] noteFileSystemChanged:download_path];

[Avi (use Gerrit), 2016/10/04 22:12:29]

-noteFileSystemChanged: has the note:

"Use of this method is discouraged. If you want to track changes to files and
directories, use the FSEvents API described in FSEvents Reference."

Yet I cannot figure out how any of the functions in the FSEvents API would be
applicable.

Huh.

[Robert Sesek, 2016/10/04 22:38:49]

Yes, as far as I know, the only public FSEvents APIs are to observe the event
stream.

   }
 }