Revert "Enable bookmark sync metadata invalidation if mismatching guid by default."

This reverts commit d13f56f8.

Reason for revert: suspicious numbers of corrupted metadata.

Original change's description:
> Enable bookmark sync metadata invalidation if mismatching guid by default.
> 
> Bug: 1032052
> Change-Id: I55801e98e7729d2bba895272ea21ab285ec20cb9
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2167282
> Reviewed-by: Mikel Astiz <mastiz@chromium.org>
> Commit-Queue: Rushan Suleymanov <rushans@google.com>
> Cr-Commit-Position: refs/heads/master@{#765030}

TBR=mastiz@chromium.org,rushans@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1032052
Change-Id: I3bda5defd8cf41c13974c81f51858aac982bef05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2199104Reviewed-by: Rushan Suleymanov <rushans@google.com>
Commit-Queue: Rushan Suleymanov <rushans@google.com>
Cr-Commit-Position: refs/heads/master@{#768290}

components/sync_bookmarks/synced_bookmark_tracker.cc

@@ -30,7 +30,7 @@ namespace sync_bookmarks {
 
 const base::Feature kInvalidateBookmarkSyncMetadataIfMismatchingGuid{
     "InvalidateBookmarkSyncMetadataIfMismatchingGuid",
-    base::FEATURE_ENABLED_BY_DEFAULT};
+    base::FEATURE_DISABLED_BY_DEFAULT};
 
 extern const base::Feature kInvalidateBookmarkSyncMetadataIfClientTagDuplicates{
     "InvalidateBookmarkSyncMetadataIfClientTagDuplicates",