Add Native Network File Share to metrics

Adds "Native Network File Share (SMB)" as the name for "@smb" provider id in metrics.

Bug: chromium:757625
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ic99300e66d9e0007a8946661a4a24a4cfc9d1b4c
Reviewed-on: https://chromium-review.googlesource.com/1011242Reviewed-by: Steve McKay <smckay@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: Allen Vicencio <allenvic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551040}

ui/file_manager/file_manager/common/js/metrics_events.js

@@ -64,6 +64,11 @@ metrics.FileSystemProviders = {
   ndjpildffkeodjdaeebdhnncfhopkajk: 'Network File Share for Chrome OS',
   gmhmnhjihabohahcllfgjooaoecglhpi: 'LanFolder',
   dmboannefpncccogfdikhmhpmdnddgoe: 'ZipArchiver',
+
+  /**
+   * Native Providers.
+   */
+  '@smb': 'Native Network File Share (SMB)',
 };
 
 /**