GitLab

Migrates MDCSnackbarManager dismissAndCallCompletionBlocksWithCategory
to MDCSnackbarManager.defaultManager.

TBR=yuweih@chromium.org

Bug: 1117399
Change-Id: Iabfebf3086e2909a0dee1a4aedc47d8b19d2956e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363758
Commit-Queue: Nohemi Fernandez <fernandex@chromium.org>
Reviewed-by: Nohemi Fernandez <fernandex@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799659}