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This CL also removes SyncReuploadBookmarkFullTitles from
fieldtrial_testing_config.json.

Some tests are fixed to pass at any state of the feature toggle
SyncReuploadBookmarkFullTitles.

Bug: 1061411
Change-Id: I021fd4eb170fbf132b51ffa7074f51c3d18a7a61
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2426703Reviewed-by: Mikel Astiz <mastiz@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Rushan Suleymanov <rushans@google.com>
Cr-Commit-Position: refs/heads/master@{#811610}