Exported bookmarks are not retaining order

[alexwykoff]

Test plan

#7195 (comment)

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• Did you search for similar issues before submitting this one?
  Yes

• Describe the issue you encountered:
  When exporting and importing the exported file, it was found that order was not maintained.

• Platform (Win7, 8, 10? macOS? Linux distro?):
  Tested on OS X

• Brave Version (revision SHA):
  0.13.3 RC 1 7024e09

• Steps to reproduce: (with a clean profile)

  1. Import a lot of bookmarks.
  2. Export bookmarks to a file. (file A)
  3. Import File A.
  4. Export bookmarks to a file. (file B)
  5. Import File B.
  6. Repeat a few more times and then do a diff of the exported files.

• Actual result:
  None of the files match.

• Expected result:
  If the importer keeps bookmarks in order, and the exporter keeps bookmarks in order, and no new bookmarks were created, edited, or deleted, then the files should be identical.

• Will the steps above reproduce in a fresh profile? If not what other info can be added?
  Yes

• Is this an issue in the currently released version?
  No

• Can this issue be consistently reproduced?
  Yes

• Extra QA steps:
  1.
  2.
  3.

• Screenshot if needed:

• Any related issues:

[darkdh]

separated re-import issue to #7194

Updated STR:

1. Import a lot of bookmarks.
2. Export bookmarks to a file. (file A)
3. Delete all the bookmarks
4. Import from file A
5. The bookmarks order should be the same as step 1